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→Uniforms passed to shaders outside the xml effect framework: Some new info from Icecode
(→Uniforms passed to shaders outside the xml effect framework: Some new info from Icecode) |
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{{forum|47|Effects & Shaders}} | |||
{{Rendering}} | |||
The effect framework as per version 2019.1 | The effect framework as per version 2019.1 | ||
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Example: | Example: | ||
<syntaxhighlight lang="xml"> | <syntaxhighlight lang="xml"> | ||
< | <blend> | ||
<active>true</active> | <active>true</active> | ||
<source>one-minus-dst-alpha</source> | <source>one-minus-dst-alpha</source> | ||
<destination>src-alpha-saturate</destination> | <destination>src-alpha-saturate</destination> | ||
</ | </blend> | ||
</syntaxhighlight> | </syntaxhighlight> | ||
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</program> | </program> | ||
</syntaxhighlight> | </syntaxhighlight> | ||
See this page for more about shaders: [[Howto:Shader programming in FlightGear]] | |||
=Uniforms passed to shaders outside the xml effect framework= | =Uniforms passed to shaders outside the xml effect framework= | ||
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|<tt>fg_ViewMatrix</tt> | |<tt>fg_ViewMatrix</tt> | ||
|<tt>mat4</tt> | |<tt>mat4</tt> | ||
|In fullscreen pass only, view matrix used to transform | |In fullscreen pass only, view matrix used to transform from world to view space. Same as osg_ViewMatrix, but for fullscreen pass. | ||
|- | |- | ||
|<tt>fg_ViewMatrixInverse</tt> | |<tt>fg_ViewMatrixInverse</tt> | ||
|<tt>mat4</tt> | |<tt>mat4</tt> | ||
|In fullscreen pass only, view matrix inverse used to transform | |In fullscreen pass only, view matrix inverse used to transform from view to world space. Same as osg_ViewMatrixInverse but for fullscreen pass. | ||
|- | |- | ||
|<tt>fg_ProjectionMatrixInverse</tt> | |<tt>fg_ProjectionMatrixInverse</tt> | ||
|<tt>mat4</tt> | |<tt>mat4</tt> | ||
|In fullscreen pass only, projection matrix inverse | |In fullscreen pass only, projection matrix inverse | ||
|- | |- | ||
|<tt>fg_CameraPositionCart</tt> | |<tt>fg_CameraPositionCart</tt> | ||
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|<tt>fg_SunAmbientColor</tt> | |<tt>fg_SunAmbientColor</tt> | ||
|<tt>vec4</tt> | |<tt>vec4</tt> | ||
| | |For fullscreen pass only, sun information as lightsource[0] is not available in fullscreen pass. | ||
|- | |- | ||
|<tt>fg_SunDiffuseColor</tt> | |<tt>fg_SunDiffuseColor</tt> | ||
|<tt>vec4</tt> | |<tt>vec4</tt> | ||
| | |For fullscreen pass only, sun information as lightsource[0] is not available in fullscreen pass. | ||
|- | |- | ||
|<tt>fg_SunSpecularColor</tt> | |<tt>fg_SunSpecularColor</tt> | ||
|<tt>vec4</tt> | |<tt>vec4</tt> | ||
| | |For fullscreen pass only, sun information as lightsource[0] is not available in fullscreen pass. | ||
|- | |- | ||
|<tt>fg_SunDirection</tt> | |<tt>fg_SunDirection</tt> | ||
|<tt>vec3</tt> | |<tt>vec3</tt> | ||
| | |For fullscreen pass only, sun information as lightsource[0] is not available in fullscreen pass. | ||
|- | |- | ||
|<tt>fg_FogColor</tt> | |<tt>fg_FogColor</tt> | ||
| Line 523: | Line 527: | ||
|<tt>osg_ViewMatrix</tt> | |<tt>osg_ViewMatrix</tt> | ||
|<tt>mat4</tt> | |<tt>mat4</tt> | ||
|Defined by OSG, used only when working on actual geometry | |Defined by OSG, used only when working on actual geometry. Transforms from world to view space. | ||
|- | |- | ||
|<tt>osg_ViewMatrixInverse</tt> | |<tt>osg_ViewMatrixInverse</tt> | ||
|<tt>mat4</tt> | |<tt>mat4</tt> | ||
|Defined by OSG, used only when working on actual geometry | |Defined by OSG, used only when working on actual geometry. Transforms from view to world space. | ||
|- | |- | ||
|<tt>osg_SimulationTime</tt> | |<tt>osg_SimulationTime</tt> | ||