oivShaderVariables.h File Reference

Go to the source code of this file.

Functions
vec4	OivFragmentColor ()
	IN.
vec4	OivFragmentTexCoord (in int unit)
	Get the interpolated texture coordinates for this fragment.
float	OivFogFragCoord ()
	Get the fog frag coord of the input vertex or fragment.
vec4	OivFrontColor (in int index)
	Get the front color of the input vertex or fragment at index.
vec4	OivBackColor (in int index)
	Get the back color of the input vertex or fragment at index.
vec4	OivTexCoord (in int index, in int unit)
	Get the texture coordinates of the input vertex at index.
float	OivFogFragCoord (in int index)
	Get the fog frag coord of the input vertex at index.
void	OivInitVertexData ()
	OUT.
void	OivSetFrontColor (in vec4 color)
	Set the front color of the output vertex for the next shader stage.
void	OivSetBackColor (in vec4 color)
	Set the back color of the output vertex for the next shader stage.
void	OivSetTexCoord (in int unit, in vec4 coord)
	Set the texture coordinates of the output vertex for the next shader stage.
void	OivSetFogFragCoord (in float coord)
	Set the fog frag coord of the output vertex for the next shader stage.
void	OivFragmentOutput (in int bufferIndex, in vec4 outputValue)
	Set the output value of the current fragment in the buffer specified by bufferIndex.
void	OivFragmentOutput (in vec4 outputValue)
	Set the output value of the current fragment.
void	OivSetupVertex (in int inIndex)
	PASSTHROUGH HELPERS.
void	OivSetupVertex ()
	Copy variables from the input vertex to the output vertex.

Function Documentation

OivBackColor()

vec4 OivBackColor

(

in int

index

)

Get the back color of the input vertex or fragment at index.

Available in: Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy value is gl_in[index].gl_BackColor

OivFogFragCoord() [1/2]

float OivFogFragCoord

(

)

Get the fog frag coord of the input vertex or fragment.

Available in: Vertex Shader Fragment Shader The equivalent legacy values are: Vertex Shader: gl_FogCoord Fragment Shader: gl_FogFragCoord

OivFogFragCoord() [2/2]

float OivFogFragCoord

(

in int

index

)

Get the fog frag coord of the input vertex at index.

Available in: Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy value is gl_in[index].gl_FogFragCoord

OivFragmentColor()

vec4 OivFragmentColor

(

)

IN.

Get the interpolated color for this fragment (as defined by OivSetFrontColor and OivSetBackColor in previous stages). Available in: Fragment Shader The equivalent legacy value is gl_Color

OivFragmentOutput() [1/2]

void OivFragmentOutput	(	in int	bufferIndex,
		in vec4	outputValue
	)

Set the output value of the current fragment in the buffer specified by bufferIndex.

Available in: Fragment Shader The equivalent legacy call is: gl_FragData[bufferIndex] = outputValue;

OivFragmentOutput() [2/2]

void OivFragmentOutput

(

in vec4

outputValue

)

Set the output value of the current fragment.

This is a convenient function that calls OivFragmentOutput(0, outputValue) Available in: Fragment Shader The equivalent legacy call is: gl_FragColor = outputValue;

OivFragmentTexCoord()

vec4 OivFragmentTexCoord

(

in int

unit

)

Get the interpolated texture coordinates for this fragment.

Available in: Fragment Shader The equivalent legacy value is gl_TexCoord[unit]

OivFrontColor()

vec4 OivFrontColor

(

in int

index

)

Get the front color of the input vertex or fragment at index.

Available in: Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy value is gl_in[index].gl_FrontColor

OivInitVertexData()

void OivInitVertexData

(

)

OUT.

Some GPU require vertex data to be initialized even if you don't use them. If you encounter message error such as: "The fragment shader uses varying _I;OIV_VERTEX_DATA;xxx, but previous shader does not write to it.", you should call this method at the beginning of your vertex shader main.

OivSetBackColor()

void OivSetBackColor

(

in vec4

color

)

Set the back color of the output vertex for the next shader stage.

Available in: Vertex Shader Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy calls are: Vertex/Tessellation Evaluation/Geometry Shaders: gl_BackColor = color; Tessellation Control Shader: gl_out[gl_InvocationID].gl_BackColor = color;

OivSetFogFragCoord()

void OivSetFogFragCoord

(

in float

coord

)

Set the fog frag coord of the output vertex for the next shader stage.

Available in: Vertex Shader Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy calls are: Vertex/Tessellation Evaluation/Geometry Shaders: gl_FogFragCoord = coord; Tessellation Control Shader: gl_out[gl_InvocationID].gl_FogFragCoord = coord;

OivSetFrontColor()

void OivSetFrontColor

(

in vec4

color

)

Set the front color of the output vertex for the next shader stage.

Available in: Vertex Shader Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy calls are: Vertex/Tessellation Evaluation/Geometry Shaders: gl_FrontColor = color; Tessellation Control Shader: gl_out[gl_InvocationID].gl_FrontColor = color;

OivSetTexCoord()

void OivSetTexCoord	(	in int	unit,
		in vec4	coord
	)

Set the texture coordinates of the output vertex for the next shader stage.

Available in: Vertex Shader Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy calls are: Vertex/Tessellation Evaluation/Geometry Shaders: gl_TexCoord[unit] = coord; Tessellation Control Shader: gl_out[gl_InvocationID].gl_TexCoord[unit] = coord;

OivSetupVertex() [1/2]

void OivSetupVertex

(

)

Copy variables from the input vertex to the output vertex.

Available in: Vertex Shader The equivalent legacy calls are: gl_FrontColor = gl_Color; gl_BackColor = gl_Color; gl_TexCoord[0] = gl_MultiTexCoord0; gl_TexCoord[1] = gl_MultiTexCoord1; gl_TexCoord[2] = gl_MultiTexCoord2; gl_TexCoord[3] = gl_MultiTexCoord3; gl_FogFragCoord = gl_FogCoord;

OivSetupVertex() [2/2]

void OivSetupVertex

(

in int

inIndex

)

PASSTHROUGH HELPERS.

Copy variables from the input vertex at inIndex to the output vertex. Available in: Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy calls are: Tessellation Evaluation/Geometry Shaders: gl_FrontColor = gl_in[inIndex].gl_FrontColor; gl_BackColor = gl_in[inIndex].gl_BackColor; gl_TexCoord = gl_in[inIndex].gl_TexCoord; gl_FogFragCoord = gl_in[inIndex].gl_FogFragCoord; Tessellation Control Shaders: gl_out[gl_InvocationID].gl_FrontColor = gl_in[inIndex].gl_FrontColor; gl_out[gl_InvocationID].gl_BackColor = gl_in[inIndex].gl_BackColor; gl_out[gl_InvocationID].gl_TexCoord = gl_in[inIndex].gl_TexCoord; gl_out[gl_InvocationID].gl_FogFragCoord = gl_in[inIndex].gl_FogFragCoord;

OivTexCoord()

vec4 OivTexCoord	(	in int	index,
		in int	unit
	)

Get the texture coordinates of the input vertex at index.

Available in: Tessellation Control Shader Tessellation Evaluation Shader Geometry Shader The equivalent legacy value is gl_in[index].gl_TexCoord[unit]