StateShader
Types
Fields
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Functions
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Shader * |
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Detailed Description
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class StateShader : public RED::Shader
Rendering pipeline configuration shader class.
@related Writing a Custom Material, Configuring a Render Shader Using a State Shader, class RED::IMaterial, class RED::RenderShader, class RED::RenderCode
The RED::StateShader is used to configure the rendering pipeline for all shaders that are rendered after it in a list of shaders in a material. Hardware and software state parameters are managed using this shader. State parameters include all the parameters typically involved in the setup of a rendering pass, such as depth equation, blending mode, stencil, lines or point shapes, etc…
Transparency should be consistent across all state shaders within a material. Ray-traced transparency information will be based on an analysis of the state shaders of the material.
Default state shader parameters are set to:
BACK face culling.
SKIP blending mode.
SKIP depth testing mode.
SKIP depth writing mode.
NO_TRANSPARENCY transparency.
1 pixel line width.
Disabled line stipple,
No polygon offset,
Color writes enabled,
Line and point smoothing off,
Line thickness and point sizes set to 1,
No displacement map,
OFF stencil mode.
Stencil ref = 0.0, stencil mask = 0xffffffff, stencil writemask = 0xffffffff,
Stencil operations: all STENCIL_OP_KEEP.
The RED::StateShader supports multiple hardware platforms, as the RED::RenderShader do. On setting up a given platform for the first time, the state shader clones any more generic platform that was setup before. For example if the shader uses a give polygon offset setup for RED::HW_GENERIC platform, on setting up a parameter for the RED::HW_NVIDIA_G400 platform, all values from the RED::HW_GENERIC platform will be copied. However, once the two platform exist, there’s no more copy of any setting: modifying the RED::HW_GENERIC platform will not change the RED::HW_NVIDIA_G400 platform parameters.
Public Types
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enum CULLING_MODE
Select the side of a triangle that is to be visible during the rendering: BACK or FRONT. To render both faces of a polygon, use NONE.
Values:
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enumerator BACK
Culls back faces of the rendered geometry.
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enumerator FRONT
Culls front faces of the rendered geometry.
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enumerator NONE
Culls neither front nor back faces of the rendered geometry.
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enumerator BACK
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enum FUNCTION
Enumeration of a depth or stencil test function.
Values:
-
enumerator NEVER
Never pass the depth or stencil test for any fragment.
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enumerator LESS
Pass the depth or stencil test if the incoming fragment’s depth is less than the current buffer depth or stencil at the fragment’s coordinates.
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enumerator LEQUAL
Pass the depth or stencil test if the incoming fragment’s depth is less than or equal to the current buffer depth or stencil at the fragment’s coordinates.
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enumerator GREATER
Pass the depth or stencil test if the incoming fragment’s depth is greater than the current buffer depth or stencil at the fragment’s coordinates.
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enumerator GEQUAL
Pass the depth or stencil test if the incoming fragment’s depth is greater than or equal to the current buffer depth or stencil at the fragment’s coordinates.
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enumerator EQUAL
Pass the depth or stencil test if the incoming fragment’s depth is equal to the current buffer depth or stencil at the fragment’s coordinates.
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enumerator NOTEQUAL
Pass the depth or stencil test if the incoming fragment’s depth is not equal to the current buffer depth or stencil at the fragment’s coordinates.
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enumerator ALWAYS
Always pass the depth or stencil test for any fragment (default).
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enumerator NEVER
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enum DEPTH_MODE
Enable or disable z testing or writing.
Values:
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enumerator DEPTH_SKIP
Let the current depth testing or writing mode unchanged (default).
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enumerator ON
Enable depth testing using the specified depth comparison function or enable depth writing.
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enumerator OFF
Disable depth testing or writing.
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enumerator DEPTH_SKIP
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enum STENCIL_MODE
Enable or disable stencil testing.
Values:
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enumerator STENCIL_ON
Enable stencil testing.
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enumerator STENCIL_OFF
Disable stencil testing.
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enumerator STENCIL_ON
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enum STENCIL_OPERATION
Lists all possible stencil operations.
Values:
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enumerator STENCIL_OP_KEEP
Stencil operation. Keep existing stencil value unchanged.
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enumerator STENCIL_OP_ZERO
Stencil operation. Set stencil value to zero.
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enumerator STENCIL_OP_REPLACE
Stencil operation. Replace stencil value by incoming stencil value.
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enumerator STENCIL_OP_INCR
Stencil operation. Increment stencil buffer by 1.
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enumerator STENCIL_OP_DECR
Stencil operation. Decrement stencil buffer by 1.
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enumerator STENCIL_OP_INVERT
Stencil operation. Invert bits in stencil buffer values.
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enumerator STENCIL_OP_KEEP
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enum BLENDING_MODE
Select the blending mode for all incoming geometries.
Values:
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enumerator SKIP
Means that we do not affect the current blending statement.
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enumerator NO_BLENDING
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enumerator ADDITIVE
color = (src_color * src_alpha) + (dest_color * (1 - src_alpha)).
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enumerator SUBTRACTIVE
color = (src_color * src_alpha) - (dest_color * (1 - src_alpha)).
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enumerator MULTIPLICATIVE
color = src_color * dest_color.
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enumerator CUSTOM
color = function1( src_color ) operand function2( dest_color ).
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enumerator SKIP
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enum BLENDING_EQUATION
Lists all possible blending operations mixing the incoming fragment color and the destination fragment color.
Values:
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enumerator ADD
color = src_color + dest_color.
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enumerator SUBTRACT
color = src_color - dest_color.
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enumerator REVERSE_SUBTRACT
color = dest_color - src_color.
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enumerator MIN
color = min( src_color, dest_color ).
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enumerator MAX
color = max( src_color, dest_color ).
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enumerator EQ_ENUM_SIZE
Size of this enumeration.
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enumerator ADD
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enum BLENDING_FUNCTION
Lists all functions that can apply to the source or destination colors in the blending equation. The blending formula is always ‘func1(src_color) operation func2(dest_color)’.
Values:
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enumerator ZERO
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enumerator ONE
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enumerator SRC_COLOR
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enumerator ONE_MINUS_SRC_COLOR
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enumerator DST_COLOR
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enumerator ONE_MINUS_DST_COLOR
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enumerator SRC_ALPHA
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enumerator ONE_MINUS_SRC_ALPHA
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enumerator DST_ALPHA
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enumerator ONE_MINUS_DST_ALPHA
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enumerator SRC_ALPHA_SATURATE
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enumerator CONSTANT_COLOR
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enumerator ONE_MINUS_CONSTANT_COLOR
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enumerator CONSTANT_ALPHA
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enumerator ONE_MINUS_CONSTANT_ALPHA
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enumerator FUNC_ENUM_SIZE
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enumerator ZERO
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enum TRANSPARENCY_MODE
Select the kind of transparency we should use for the shader.
Values:
-
enumerator NO_TRANSPARENCY
The name says it.
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enumerator MASKED_TRANSPARENCY
This is a fake transparency. The texture specified in RED::StateShader::SetMaskedTransparency is used as a filter for the fragments to render. There’s no blending at all as the transparency result is a binary 0 / 1 value. Ray-traced shadows are defined by the masking texture’s alpha intensity.
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enumerator SORTED_TRANSPARENCY
Blended transparency. The color or transparency texture is specified by RED::StateShader::SetSortedTransparency. Ray-traced shadows are defined by the color of the transparency, or by the texture’s color modulated by the texture’s alpha.
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enumerator SORTED_AND_MASKED_TRANSPARENCY
The texture’s alpha value is used to mask the pixel regions where the fragments are rendered. This combines both transparency modes, using the single texture specified with RED::StateShader::SetSortedAndMaskedTransparency. Ray-traced shadows are computed as for the RED::StateShader::SORTED_TRANSPARENCY mode.
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enumerator NO_TRANSPARENCY
Public Functions
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SET_CID(CID_class_REDStateShader)
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IMPLEMENT_AS()
- SET_CHUNK_SIGNATURE (0x00000707)
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IMPLEMENT_CHUNKINTERPRETER()
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StateShader()
Construction method.
The StateShader is using a RED::HARDWARE_PLATFORM identifier for all data setup & access, in all ways similarly to the RED::RenderShader, so that the same state shader instance can behave differently on different hardware.
A state shader uses the default RED::Object ID set at its creation time.
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virtual ~StateShader()
Destruction method.
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RED_RC SetNoTransparency(RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Indicates that we are not transparent at all.
This is the default of a state shader.
- Parameters
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetMaskedTransparency(const RED::Object *iAlphaImage, RED::MESH_CHANNEL iAlphaChannel, const RED::Matrix &iAlphaMatrix, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines a mask based transparency.
See \ref bk_bm_custom_state_alphamask for details.
- Parameters
iAlphaImage – Specify the address of the alpha masking texture.
iAlphaChannel – Mesh channel source of the UV for the alpha mapping transparency texture sampling.
iAlphaMatrix – Texture matrix for iAlphaImage.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetSortedTransparency(const RED::Color &iOpacityColor, const RED::Object *iOpacityTexture, RED::MESH_CHANNEL iOpacityUV, const RED::Matrix &iOpacityMatrix, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines a per pixel depth sorted transparency.
We may use an opacity color or an opacity texture in this configuration. We are not alpha masked by the texture’s alpha values.
See also \ref bk_improving_cad_graphics.
- Parameters
iOpacityColor – Opacity color.
iOpacityTexture – Opacity texture. Overrides iOpacityColor when set.
iOpacityUV – UV channel to use if we have a, opacity texture.
iOpacityMatrix – Opacity texture matrix.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
-
RED_RC SetSortedTransparency(const RED::Color &iOpacityColor, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines a per pixel depth sorted transparency.
We may use an opacity color here. This call is equivalent to setting a sorted transparency without texture using:
RED::StateShader::SetSortedTransparency( iOpacityColor, NULL, RED::MCL_TEX0, RED::Matrix::IDENTITY, iPlatformID );
- Parameters
iOpacityColor – Opacity color.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetSortedAndMaskedTransparency(const RED::Object *iOpacityTexture, RED::MESH_CHANNEL iOpacityUV, const RED::Matrix &iOpacityMatrix, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines a depth sorted transparency with an alpha mask.
We use an opacity texture in this configuration. The texture’s color is used as the opacity color, and the texture’s alpha is used as alpha mask for the rendering.
- Parameters
iOpacityTexture – Opacity texture.
iOpacityUV – UV channel to use to sample the opacity texture.
iOpacityMatrix – Opacity texture matrix.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetAlphaThreshold(float iAlphaThreshold, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the alpha masking threshold.
This value is used to define the alpha masking ratio for alpha masked transparency.
See \ref bk_bm_custom_state_alphamask for details.
- Parameters
iAlphaThreshold – New value [0.0f,1.0f].
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetFaceCulling(CULLING_MODE iCullingMode, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Sets the face culling mode.
Sets the culling mode for all incoming geometries.
- Parameters
iCullingMode – Face culling mode.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetBlendingMode(BLENDING_MODE iBlendingMode, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the color blending mode.
Sets the blending mode for all incoming geometry. The RED::StateShader::SKIP blending mode indicates that the state shader will not interfere with the current blending parameters.
See \ref bk_bm_custom_state_transpar and \ref bk_bm_custom_state_blend for details on blending and transparency.
- Parameters
iBlendingMode – The blending mode to use.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetBlendingMode(BLENDING_MODE iBlendingMode, BLENDING_FUNCTION iFunction1, BLENDING_EQUATION iOperation, BLENDING_FUNCTION iFunction2, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the color blending mode.
Sets the blending mode for all incoming geometry. All parameters of the blending equation are set by this call.
See \ref bk_bm_custom_state_transpar and \ref bk_bm_custom_state_blend for details on blending and transparency.
- Parameters
iBlendingMode – The blending mode to use.
iFunction1 – Function applied to the incoming fragment color.
iOperation – Operation combining the two colors.
iFunction2 – Function applied to the buffer fragment color.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetBlendingConstant(const RED::Color &iConstant, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Sets the constant colors/alpha usable in the blending.
Sets the constant color that can be used in a blending equation, for functions using one of the following BLENDING_FUNCTIONs:
CONSTANT_COLOR,
ONE_MINUS_CONSTANT_COLOR,
CONSTANT_ALPHA,
ONE_MINUS_CONSTANT_ALPHA.
See \ref bk_bm_custom_state_transpar and \ref bk_bm_custom_state_blend for details on blending and transparency.
- Parameters
iConstant – Source and destination color constant.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetBlendingMode(int iNumBuffer, BLENDING_FUNCTION iFunction1, BLENDING_EQUATION iOperation, BLENDING_FUNCTION iFunction2, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the color blending mode for a single drawing buffer of a multiple render target VRL.
Requires blending to be activated using RED::StateShader::SetBlendingMode and the rendering to occur in a multiple render target VRL, created using RED::IWindow::CreateMultiRenderTargetVRL.
A first call to RED::StateShader::SetBlendingMode will turn on blending for all drawing buffers available in the VRL. Then, per buffer blending operations can be configured using this call.
See \ref bk_bm_custom_state_transpar and \ref bk_bm_custom_state_blend for details on blending and transparency.
Note that your hardware must support the ARB_draw_buffers_blend OpenGL extension, otherwise, the operation is ignored.
- Parameters
iNumBuffer – The number of the buffer being targeted.
iFunction1 – Function applied to the incoming fragment color.
iOperation – Operation combining the two colors.
iFunction2 – Function applied to the buffer fragment color.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetDoubleSided(bool iDoubleSided, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Renders the geometry once or twice.
Renders the geometry once if iDoubleSided is false, and renders the geometry twice if iDoubleSided is true. The polygon facing reference RED::RenderShaderParameter::REF_POLYGON_FACING can be used to identify which object side is currently being rendered.
- Parameters
iDoubleSided – Are we double sided ?
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetDepthFunction(FUNCTION iFunc, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Specifies the depth function to use.
Depth testing must be enabled for this function to be effectively set.
- Parameters
iFunc – The new depth test function.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetDepthTest(DEPTH_MODE iTest, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Specifies the depth testing mode.
SKIP lets the previous state shader or pass startup mode unmodified.
Note that in standard OpenGL if the depth test is disabled, then there won’t be any depth write that will occur, even if the depth mask is enabled.
- Parameters
iTest – The new depth test mode.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetDepthMask(DEPTH_MODE iMask, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Specifies the depth masking (write) mode.
SKIP lets the previous state shader or pass startup mode unmodified.
- Parameters
iMask – The new depth write mode.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetLineWidth(float iWidth, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Specifies the pixel width of rendered lines.
Define the pixel width of rendered lines. Note that enabling engine anti-aliasing reduces the size of rendered lines because of the super sampling method used. When engine AA is enabled, it may be necessary to increase the specified line width.
The rendering of thick lines is supported by the GPU rendering but is not supported by the software ray-tracer. However, 1 pixel wide lines can be rendered by the software ray-tracer.
- Parameters
iWidth – Pixel width of lines.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
-
RED_RC SetLineStipple(bool iOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables or disables line stipple.
See \ref wf_hidden_lines_removal_a_real_time_example for a practical example of line stipple.
- Parameters
iOnOff – Enable or disable line stipple.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetLineStipplePattern(int iFactor, short iPattern, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the line stipple parameters.
See \ref wf_hidden_lines_removal_a_real_time_example for a practical example of line stipple.
- Parameters
iFactor – Line stipple factor. This is the scaling applied to the line stipple pattern. Input value is clamped to [1,256]. For example, using a factor of 3 repeats three times each bit equal to 1 defined in the pattern.
iPattern – Line stipple pattern. This is a mask of 16 bits that define the line pattern used to draw lines.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetLineSmoothing(bool iOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables or disables line smoothing.
Uses OpenGL line smoothing capabilities, improving the quality of thick lines being rendered with a line stipple pattern.
- Parameters
iOnOff – Enable or disable line smoothing.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetPointSmoothing(bool iOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables or disables point smoothing.
Uses OpenGL point smoothing capabilities, improving the quality of points being rendered with a point size greater than 1. If activated, points are rendered round instead of square.
- Parameters
iOnOff – Enable or disable point smoothing.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetPointSize(float iSize, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the point size.
Define the OpenGL point size. This is the diameter of the point size.
- Parameters
iSize – Diameter of rendered points.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetPolygonOffset(bool iOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables or disables polygon offset.
Only triangle based data may be depth offseted using the polygon offset. Other primitives may not be offseted.
The polygon offset is useful to avoid geometry stitching artifacts and is widely used to prevent edges of a mesh to be z-fighting with the geometry they represent.
- Parameters
iOnOff – Enable or disable polygon offset.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetPolygonOffsetValue(float iFactor, float iUnits, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the polygon offset parameters.
The polygon offset is useful to avoid geometry stitching artifacts and is widely used to prevent edges of a mesh to be z-fighting with the geometry they represent.
Usually, ‘iFactor’ starts at 1.0 and is below 10.0; ‘iUnits’ starts at 1.0 and may be up to 100.0+ depending on the viewing conditions.
- Parameters
iFactor – Angular factor used in the polygon offset equation.
iUnits – Number of biasing units in the polygon offset equation.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetColorMask(bool iWriteR, bool iWriteG, bool iWriteB, bool iWriteA, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the color write mode.
- Parameters
iWriteR – Authorized to write red color component?
iWriteG – Authorized to write green color component?
iWriteB – Authorized to write blue color component?
iWriteA – Authorized to write alpha color component?
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetMatte(bool iMatte, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the matte mode.
When a material has the matte mode set to true, it is considered as not being lit directly. Instead, it receives shadows cast by the other objects in the scene as well as their global illumination contribution.
Matte objects are useful when rendering synthetic objects into real-world photographs for example.
- Parameters
iMatte – Enable (true) or disable (false) matte mode.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetDisplacement(float iDispHeight, const RED::Object *iDispTexture, const RED::Matrix &iDispMatrix, RED::MESH_CHANNEL iDispUV, float iDispOffset, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines a displacement map for the rendering of the object.
Defines a displacement map for the object. A displacement map is used to define a surface elevation at each texel on the rendered geometry. Texel triangles are created in a transient manner during the rendering to increase the detail of rendered geometries.
The height of the displacement map is the .x coordinate read from the texture map. The displacement map must be a RED::TGT_TEX_2D texture. The RED::FMT_L8 is best to use for the texture storage.
Displacement mapping can be removed by calling SetDisplacement with NULL as displacement texture.
Displacement mapping can be enabled or disabled for the ray-tracer by setting the wished RED::OPTIONS_RAY_DISPLACEMENT value.
Displacement mapping is ignored in hardware rendering.
See \ref wf_displacement for a displacement mapping example.
- Parameters
iDispHeight – Maximal height of the displacement in model units. This value must be positive. To have a displacement “below” the displaced surface, please use a negative ‘iDispOffset’ value and a positive ‘iDispHeight’.
iDispTexture – Displacement texture. Must be a valid 2D image or NULL to disable displacement.
iDispMatrix – Displacement texture matrix.
iDispUV – UV channel to use to sample the displacement texture. Must be in the [ RED::MCL_TEX0, RED::MCL_TEX7 ] range.
iDispOffset – Displacement offset. This is a global translation of the displacement region. Setting a negative offset value for example equal to ‘iDispHeight’ generates a displacement surface that appears below the actual original surface level.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetStencilTest(STENCIL_MODE iTest, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables or disables stencil testing.
RED::StateShader::STENCIL_OFF is the default. See \ref bk_ba_no_stencil_buffer_on_auxiliary_vrls for details on using stencil buffer on various hardware.
- Parameters
iTest – Specify the stencil test mode.
iPlatformID – Platform identifier.
- Returns
RED_OK is the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetStencilFunction(FUNCTION iFunc, int iRef, int iMask, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines the stencil function.
Defines the standard OpenGL stencil test: ( iRef & iMask ) iFunc ( stencil_buffer & iMask ) See \ref bk_ba_no_stencil_buffer_on_auxiliary_vrls for details on using stencil buffer on various hardware.
- Parameters
iFunc – The new stencil test function.
iRef – Reference value for the stencil test.
iMask – Bitwise AND mask for stencil test.
iPlatformID – Platform identifier.
- Returns
RED_OK is the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetStencilOperation(STENCIL_OPERATION iFailOp, STENCIL_OPERATION iZFailOp, STENCIL_OPERATION iZPassOp, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Defines all stencil operations.
See \ref bk_ba_no_stencil_buffer_on_auxiliary_vrls for details on using stencil buffer on various hardware.
- Parameters
iFailOp – Stencil operation that occurs when the stencil test fails.
iZFailOp – Stencil operation that occurs when the stencil test passes and the depth test fails.
iZPassOp – Stencil operation that occurs when the stencil test and the depth test passes.
iPlatformID – Platform identifier.
- Returns
RED_OK is the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed.
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RED_RC SetStencilMask(int iMask, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Specifies the stencil writemask value.
See \ref bk_ba_no_stencil_buffer_on_auxiliary_vrls for details on using stencil buffer on various hardware.
- Parameters
iMask – The new stencil mask value.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetReflectiveCaustics(bool iReflectiveCaustics, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables/disables reflective caustics.
True to enable the generation of reflective caustics.
- Parameters
iReflectiveCaustics – Are reflective caustics enabled?
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC SetRefractiveCaustics(bool iRefractiveCaustics, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC)
Enables/disables refractive caustics.
True to enable the generation of refractive caustics.
- Parameters
iRefractiveCaustics – Are refractive caustics enabled?
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC GetPlatformsCount(int &oCount) const
Gets the number of platforms used by this shader.
This method returns the number of hardware platforms that have been configured for this shader.
- Parameters
oCount – Number of hardware platforms used by the shader.
- Returns
RED_OK when the method has succeeded,
RED_FAIL otherwise.
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RED_RC GetPlatformList(RED::Vector<RED::HARDWARE_PLATFORM> &oPlatformList) const
Gets the list of hardware platforms used by the shader.
This method fills a RED::Vector with the list of hardware platforms that are used by the shader.
- Parameters
oPlatformList – The list of hardware platforms.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetTransparencyMode(TRANSPARENCY_MODE &oTransparency, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the kind of transparency we manage.
- Parameters
oTransparency – The transparency mode for all shaders after this one in its rendering pass.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetTransparencyImage(RED::Object **oImage, RED::MESH_CHANNEL &oUVChannel, RED::Matrix &oMatrix, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Retrieves transparency texture parameters.
- Parameters
oImage – Address of the transparency / alpha texture if it exists.
oUVChannel – Mesh channel used to sample ‘oImage’.
oMatrix – Texture matrix for ‘oImage’.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetTransparencyColor(RED::Color &oTransparColor, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the color of the transparency.
- Parameters
oTransparColor – Transparency color.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetAlphaThreshold(float &oAlpha, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the alpha masking threshold.
- Parameters
oAlpha – The alpha threshold value for all shaders after this one.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetBlendingMode(BLENDING_MODE &oBlend, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the state shader blending mode.
- Parameters
oBlend – The blending mode for the shader.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetBlendingMode(BLENDING_MODE &oBlend, BLENDING_FUNCTION &oFunction1, BLENDING_EQUATION &oEquation, BLENDING_FUNCTION &oFunction2, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the detailed state shader blending mode.
- Parameters
oBlend – The blending mode for the shader.
oFunction1 – Function applied to the incoming fragment color.
oEquation – Operation combining the two colors.
oFunction2 – Function applied to the buffer fragment color.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetBlendingMode(BLENDING_FUNCTION &oFunction1, BLENDING_EQUATION &oEquation, BLENDING_FUNCTION &oFunction2, int iNumBuffer, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the detailed state shader blending mode for a specified iNumBuffer.
- Parameters
oFunction1 – Function applied to the incoming fragment color.
oEquation – Operation combining the two colors.
oFunction2 – Function applied to the buffer fragment color.
iNumBuffer – The number of the buffer being targeted in the VRL.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetFaceCulling(CULLING_MODE &oCullMode, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the face culling mode.
- Parameters
oCullMode – Face culling mode.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetDoubleSided(bool &oDoubleSided, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Should the rendering be double sided?
- Parameters
oDoubleSided – true if we are double sided.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetDepthFunction(FUNCTION &oFunc, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the depth function.
- Parameters
oFunc – The depth function for the shader.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetDepthTest(DEPTH_MODE &oDepth, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the depth testing mode.
- Parameters
oDepth – The depth testing mode for the shader.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetDepthMask(DEPTH_MODE &oMask, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the depth masking mode.
- Parameters
oMask – The depth masking mode for the shader.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetLineWidth(float &oWidth, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the pixel width of rendered lines.
- Parameters
oWidth – Pixel width of lines.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetLineStipple(bool &oOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets line stipple activation status.
- Parameters
oOnOff – Is line stipple enabled ?
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetLineStipplePattern(int &oFactor, short &oPattern, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the line stipple parameters.
- Parameters
oFactor – Line stipple factor. This is the scaling applied to the line stipple pattern.
oPattern – Line stipple pattern. This is a mask of 16 bits that define the line pattern used to draw lines.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetLineSmoothing(bool &oOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the line smoothing activation status.
- Parameters
oOnOff – Is line smoothing enabled ?
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetPointSmoothing(bool &oOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the point smoothing activation status.
- Parameters
oOnOff – Is point smoothing enabled ?
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetPointSize(float &oPointSize, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the point size.
- Parameters
oPointSize – Return the point size diameter.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetPolygonOffset(bool &oOnOff, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the polygon offset activation status.
- Parameters
oOnOff – Is polygon offset enabled ?
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetPolygonOffsetValue(float &oFactor, float &oUnits, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the polygon offset parameters.
- Parameters
oFactor – Angular factor used in the polygon offset equation.
oUnits – Number of biasing units in the polygon offset equation.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetColorMask(bool &oWriteR, bool &oWriteG, bool &oWriteB, bool &oWriteA, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the color masking mode.
- Parameters
oWriteR – Authorized to write red color component?
oWriteG – Authorized to write green color component?
oWriteB – Authorized to write blue color component?
oWriteA – Authorized to write alpha color component?
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetMatte(bool &oMatte, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Gets the matte mode (see SetMatte for details).
- Parameters
oMatte – matte mode enabled?
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetDisplacement(float &oDispHeight, RED::Object *&oDispTexture, RED::Matrix &oDispMatrix, RED::MESH_CHANNEL &oDispUV, float &oDispOffset, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Retrieves the displacement mapping parameters.
- Parameters
oDispHeight – Maximal displacement height in model units.
oDispMatrix – Displacement texture matrix.
oDispTexture – Displacement texture.
oDispUV – Displacement UV channel.
oDispOffset – Displacement offset translation.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetStencilTest(STENCIL_MODE &oStencil, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the stencil testing mode.
- Parameters
oStencil – The stencil testing mode for the shader.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetStencilFunction(FUNCTION &oFunc, int &oRef, int &oMask, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the stencil function.
- Parameters
oFunc – The stencil function set in this shader.
oRef – Reference value for the stencil test.
oMask – Bitwise AND mask for stencil test.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetStencilOperation(STENCIL_OPERATION &oFailOp, STENCIL_OPERATION &oZFailOp, STENCIL_OPERATION &oZPassOp, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the stencil operations.
- Parameters
oFailOp – Stencil operation that occurs when the stencil test fails.
oZFailOp – Stencil operation that occurs when the stencil test passes and the depth test fails.
oZPassOp – Stencil operation that occurs when the stencil test and the depth test passes.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetStencilMask(int &oMask, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the stencil writemask.
- Parameters
oMask – The stencil writemask.
iPlatformID – Platform identifier.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter.
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RED_RC GetReflectiveCaustics(bool &oReflectiveCaustics, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the reflective caustics enabled status.
- Parameters
oReflectiveCaustics – Reflective caustics enabled status.
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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RED_RC GetRefractiveCaustics(bool &oRefractiveCaustics, RED::HARDWARE_PLATFORM iPlatformID = RED::HW_GENERIC) const
Returns the refractive enabled caustics status.
- Parameters
oRefractiveCaustics – Are refractive caustics enabled?
iPlatformID – Platform identifier.
- Returns
RED_OK when the operation succeeded,
RED_BAD_PARAM if the method received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation did fail.
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virtual RED_RC UpdateFrom(const RED::Object &iShader, const RED::State &iState, int iSrcStateNumber)
Internal update event method.
- Parameters
iShader – Source shader.
iState – Current transaction parameter.
iSrcStateNumber – Source state number.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed,
RED_FAIL otherwise.
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virtual RED_RC GetOperationStream(const RED::Object *iCaller, RED::Vector<int> &ioStream, RED::HARDWARE_PLATFORM iPlatformID) const
Internal access to the operation stream of a shader.
Internal RED usage method. Writes down the shader stream.
- Parameters
iCaller – Pointer to the method caller.
ioStream – Stream to write to.
iPlatformID – Target hardware platform identifier.
- Returns
RED_OK when the shader could have its operation stream written down,
RED_ALLOC_FAILURE if an internal allocation did fail,
RED_FAIL otherwise.
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RED_RC Solve(RED::IReferenceManager *iReferenceManager, const RED::State &iState)
Shader texture reference solving.
- Parameters
iReferenceManager – Reference repository.
iState – Current transaction parameter.
-
virtual RED_RC Save(RED::IStream *iStream, StreamingPolicy &iPolicy, int iState = -1) const
Internal class streaming.
- Parameters
iStream – The target stream.
iPolicy – The streaming policy.
iState – The written transaction number.
- Returns
RED_OK if the operation has succeeded,
RED_BAD_PARAM if the method has received an invalid parameter,
RED_ALLOC_FAILURE if an internal allocation has failed,
RED_FAIL otherwise.
