make transition effect Rembrandt compatible.
Note: this is the transition effect used by the materials-dds.xml Signed-off-by: Emilian Huminiuc <emilianh@gmail.com>
This commit is contained in:
Emilian Huminiuc
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3 changed files with 477 additions and 0 deletions
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@ -89,6 +89,306 @@ parameters :
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<tangent type="int">6</tangent>
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<binormal type="int">7</binormal>
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</generate>-->
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<technique n="8">
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<predicate>
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<and>
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<property>/sim/rendering/shaders/transition</property>
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<property>/sim/rendering/rembrandt/enabled</property>
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<less-equal>
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<value type="float">4.0</value>
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<float-property>/sim/rendering/shaders/water</float-property>
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</less-equal>
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<or>
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<less-equal>
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<value type="float">2.0</value>
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<glversion/>
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</less-equal>
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<and>
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<extension-supported>GL_ARB_shader_objects</extension-supported>
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<extension-supported>GL_ARB_shading_language_100</extension-supported>
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<extension-supported>GL_ARB_vertex_shader</extension-supported>
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<extension-supported>GL_ARB_fragment_shader</extension-supported>
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</and>
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</or>
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<extension-supported>GL_EXT_gpu_shader4</extension-supported>
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</and>
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</predicate>
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<pass>
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<lighting>true</lighting>
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<!-- Use material values that are either inherited from the
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terrain-default effect or supplied by an effect derived
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from this one e.g., one created in the materials library. -->
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<material>
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<ambient>
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<use>material/ambient</use>
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</ambient>
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<diffuse>
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<use>material/diffuse</use>
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</diffuse>
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<specular>
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<use>material/specular</use>
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</specular>
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<color-mode>ambient-and-diffuse</color-mode>
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</material>
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<blend>
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<use>transparent</use>
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</blend>
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<alpha-test>
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<use>transparent</use>
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</alpha-test>
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<shade-model>smooth</shade-model>
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<cull-face>back</cull-face>
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<render-bin>
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<bin-number>
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<use>render-bin/bin-number</use>
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</bin-number>
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<bin-name>
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<use>render-bin/bin-name</use>
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</bin-name>
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</render-bin>
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<texture-unit>
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<unit>0</unit>
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<image>
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<use>texture[0]/image</use>
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</image>
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<filter>
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<use>texture[0]/filter</use>
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</filter>
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<wrap-s>
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<use>texture[0]/wrap-s</use>
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</wrap-s>
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<wrap-t>
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<use>texture[0]/wrap-t</use>
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</wrap-t>
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<internal-format>
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<use>texture[0]/internal-format</use>
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</internal-format>
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</texture-unit>
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<texture-unit>
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<unit>1</unit>
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<image>
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<use>texture[2]/image</use>
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</image>
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<filter>
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<use>texture[2]/filter</use>
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</filter>
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<wrap-s>
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<use>texture[2]/wrap-s</use>
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</wrap-s>
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<wrap-t>
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<use>texture[2]/wrap-t</use>
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</wrap-t>
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<internal-format>
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<use>texture[2]/internal-format</use>
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</internal-format>
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</texture-unit>
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<texture-unit>
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<unit>2</unit>
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<image>
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<use>texture[3]/image</use>
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</image>
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<filter>
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<use>texture[3]/filter</use>
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</filter>
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<wrap-s>
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<use>texture[3]/wrap-s</use>
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</wrap-s>
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<wrap-t>
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<use>texture[3]/wrap-t</use>
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</wrap-t>
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<internal-format>
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<use>texture[3]/internal-format</use>
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</internal-format>
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</texture-unit>
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<texture-unit>
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<unit>3</unit>
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<image>
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<use>texture[4]/image</use>
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</image>
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<filter>
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<use>texture[4]/filter</use>
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</filter>
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<wrap-s>
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<use>texture[4]/wrap-s</use>
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</wrap-s>
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<wrap-t>
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<use>texture[4]/wrap-t</use>
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</wrap-t>
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<internal-format>
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<use>texture[4]/internal-format</use>
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</internal-format>
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</texture-unit>
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<texture-unit>
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<unit>4</unit>
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<type>noise</type>
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</texture-unit>
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<program>
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<!-- <vertex-shader>Shaders/include_fog.vert</vertex-shader> -->
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<vertex-shader n="1">Shaders/transition-gbuffer.vert</vertex-shader>
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<fragment-shader n="0">Shaders/transition-gbuffer.frag</fragment-shader>
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<fragment-shader n="1">Shaders/gbuffer-functions.frag</fragment-shader>
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<fragment-shader n="2">Shaders/gbuffer-encode.frag</fragment-shader>
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</program>
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<uniform>
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<name>BaseTex</name>
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<type>sampler-2d</type>
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<value type="int">0</value>
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</uniform>
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<uniform>
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<name>SecondTex</name>
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<type>sampler-2d</type>
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<value type="int">1</value>
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</uniform>
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<uniform>
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<name>ThirdTex</name>
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<type>sampler-2d</type>
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<value type="int">2</value>
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</uniform>
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<uniform>
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<name>SnowTex</name>
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<type>sampler-2d</type>
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<value type="int">3</value>
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</uniform>
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<uniform>
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<name>NoiseTex</name>
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<type>sampler-3d</type>
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<value type="int">4</value>
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</uniform>
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<uniform>
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<name>RainNorm</name>
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<type>float</type>
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<value>
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<use>rain-norm</use>
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</value>
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</uniform>
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<uniform>
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<name>SnowLevel</name>
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<type>float</type>
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<value>
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<use>snow-level</use>
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</value>
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</uniform>
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<uniform>
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<name>Transitions</name>
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<type>float</type>
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<value>
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<use>transitions</use>
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</value>
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</uniform>
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<uniform>
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<name>InverseSlope</name>
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<type>float</type>
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<value>
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<use>inverse</use>
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</value>
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</uniform>
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<uniform>
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<name>CloudCover0</name>
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<type>float</type>
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<value>
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<use>cloud-cover0</use>
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</value>
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</uniform>
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<uniform>
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<name>CloudCover1</name>
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<type>float</type>
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<value>
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<use>cloud-cover1</use>
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</value>
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</uniform>
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<uniform>
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<name>CloudCover2</name>
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<type>float</type>
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<value>
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<use>cloud-cover2</use>
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</value>
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</uniform>
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<uniform>
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<name>CloudCover3</name>
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<type>float</type>
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<value>
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<use>cloud-cover3</use>
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</value>
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</uniform>
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<uniform>
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<name>CloudCover4</name>
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<type>float</type>
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<value>
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<use>cloud-cover4</use>
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</value>
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</uniform>
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<!-- BEGIN fog include -->
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<uniform>
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<name>visibility</name>
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<type>float</type>
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<value>
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<use>visibility</use>
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</value>
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</uniform>
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<uniform>
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<name>avisibility</name>
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<type>float</type>
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<value>
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<use>avisibility</use>
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</value>
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</uniform>
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<uniform>
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<name>hazeLayerAltitude</name>
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<type>float</type>
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<value>
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<use>lthickness</use>
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</value>
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</uniform>
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<uniform>
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<name>scattering</name>
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<type>float</type>
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<value>
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<use>scattering</use>
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</value>
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</uniform>
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<uniform>
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<name>terminator</name>
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<type>float</type>
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<value>
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<use>terminator</use>
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</value>
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</uniform>
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<uniform>
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<name>fogType</name>
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<type>int</type>
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<value>
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<use>fogtype</use>
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</value>
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</uniform>
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<!-- END fog include -->
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</pass>
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</technique>
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<technique n="9">
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<predicate>
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160
Shaders/transition-gbuffer.frag
Normal file
160
Shaders/transition-gbuffer.frag
Normal file
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@ -0,0 +1,160 @@
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// -*-C++-*-
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// Texture switching based on face slope and snow level
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// based on earlier work by Frederic Bouvier, Tim Moore, and Yves Sablonier.
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// <20> Emilian Huminiuc 2011
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varying vec4 RawPos;
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varying vec3 normal;
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varying vec3 Vnormal;
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uniform float SnowLevel;
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uniform float Transitions;
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uniform float InverseSlope;
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uniform float RainNorm;
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uniform float CloudCover0;
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uniform float CloudCover1;
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uniform float CloudCover2;
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uniform float CloudCover3;
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uniform float CloudCover4;
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uniform sampler2D BaseTex;
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uniform sampler2D SecondTex;
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uniform sampler2D ThirdTex;
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uniform sampler2D SnowTex;
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uniform sampler3D NoiseTex;
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// gbuffer function
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void encode_gbuffer(vec3 normal, vec3 color, int mId, float specular, float shininess, float emission, float depth);
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///////////////////
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void main()
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{
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float MixFactor;
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float NdotL;
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float NdotHV;
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float fogFactor;
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float cover;
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float slope;
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float L1;
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float L2;
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float wetness;
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float pf;
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vec3 n;
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vec3 lightDir;
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vec3 halfVector;
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vec4 texel;
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vec4 fragColor;
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vec4 color;
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vec4 Noise;
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cover = min(min(min(min(CloudCover0, CloudCover1),CloudCover2),CloudCover3),CloudCover4);
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Noise = texture3D(NoiseTex, RawPos.xyz*0.0011);
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MixFactor = Noise.r * Noise.g * Noise.b; //Mixing Factor to create a more organic looking boundary
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MixFactor *= 300.0;
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MixFactor = clamp(MixFactor, 0.0, 1.0);
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L1 = 0.90 - 0.02 * MixFactor; //first transition slope
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L2 = 0.78 + 0.04 * MixFactor; //Second transition slope
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// If gl_Color.a == 0, this is a back-facing polygon and the
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// Vnormal should be reversed.
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n = (2.0 * gl_Color.a - 1.0) * Vnormal;
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n = normalize(n);
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color = vec4(1.0);
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//Select texture based on slope
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slope = normalize(normal).z;
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//pull the texture fetch outside flow control to fix aliasing artefacts :(
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vec4 baseTexel = texture2D(BaseTex, gl_TexCoord[0].st);
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vec4 secondTexel = texture2D(SecondTex, gl_TexCoord[0].st);
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vec4 thirdTexel = texture2D(ThirdTex, gl_TexCoord[0].st);
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vec4 snowTexel = texture2D(SnowTex, gl_TexCoord[0].st);
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//Normal transition. For more abrupt faces apply another texture (or 2).
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if (InverseSlope == 0.0) {
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//Do we do an intermediate transition
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if (Transitions >= 1.5) {
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if (slope >= L1) {
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texel = baseTexel;
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}
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if (slope >= L2 && slope < L1){
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texel = mix(secondTexel, baseTexel, smoothstep(L2, L1 - 0.06 * MixFactor, slope));
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}
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if (slope < L2){
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texel = mix(thirdTexel, secondTexel, smoothstep(L2 - 0.13 * MixFactor, L2, slope));
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}
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// Just one transition
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} else if (Transitions < 1.5) {
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if (slope >= L1) {
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texel = baseTexel;
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}
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if (slope < L1) {
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texel = mix(thirdTexel, baseTexel, smoothstep(L2 - 0.13 * MixFactor, L1, slope));
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}
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}
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//Invert the transition: keep original texture on abrupt slopes and switch to another on flatter terrain
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} else if (InverseSlope > 0.0) {
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//Interemdiate transition ?
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if (Transitions >= 1.5) {
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if (slope >= L1 + 0.1) {
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texel = thirdTexel;
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}
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if (slope >= L2 && slope < L1 + 0.1){
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texel = mix(secondTexel, thirdTexel, smoothstep(L2 + 0.06 * MixFactor, L1 + 0.1, slope));
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}
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if (slope <= L2){
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texel = mix(baseTexel, secondTexel, smoothstep(L2 - 0.06 * MixFactor, L2, slope));
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}
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//just one
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} else if (Transitions < 1.5) {
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if (slope > L1 + 0.1) {
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texel = thirdTexel;
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}
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if (slope <= L1 + 0.1){
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texel = mix(baseTexel, thirdTexel, smoothstep(L2 - 0.06 * MixFactor, L1 + 0.1, slope));
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}
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}
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}
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//darken textures with wetness
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wetness = 1.0 - 0.3 * RainNorm;
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texel.rgb = texel.rgb * wetness;
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float altitude = RawPos.z;
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//Snow texture for areas higher than SnowLevel
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if (altitude >= SnowLevel - (1000.0 * slope + 300.0 * MixFactor) && slope > L2 - 0.12) {
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texel = mix( texel,
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mix( texel, snowTexel, smoothstep(L2 - 0.09 * MixFactor, L2, slope) ),
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smoothstep(SnowLevel - (1000.0 * slope + 300.0 * MixFactor),
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SnowLevel - (1000.0 * slope - 150.0 * MixFactor),
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altitude)
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);
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}
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fragColor = color * texel;
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if(cover >= 2.5){
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fragColor.rgb = fragColor.rgb * 1.2;
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} else {
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fragColor.rg = fragColor.rg * (0.6 + 0.2 * cover);
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fragColor.b = fragColor.b * (0.5 + 0.25 * cover);
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}
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fragColor.rgb *= 1.2 - 0.4 * MixFactor;
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float specular = dot( gl_FrontMaterial.specular.rgb, vec3( 0.3, 0.59, 0.11 ) );
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float emission = dot( gl_FrontLightModelProduct.sceneColor.rgb + gl_FrontMaterial.emission.rgb,
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vec3( 0.3, 0.59, 0.11 )
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);
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encode_gbuffer( n, fragColor.rgb, 1, specular, gl_FrontMaterial.shininess, emission, gl_FragCoord.z );
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}
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17
Shaders/transition-gbuffer.vert
Normal file
17
Shaders/transition-gbuffer.vert
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@ -0,0 +1,17 @@
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// -*- mode: C; -*-
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// Licence: GPL v2
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// Authors: Frederic Bouvier, Emilian Huminiuc
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//
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varying vec4 RawPos;
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varying vec3 normal;
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varying vec3 Vnormal;
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void main() {
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RawPos = gl_Vertex;
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gl_Position = ftransform();
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gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
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normal = normalize(gl_Normal);
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Vnormal = gl_NormalMatrix * gl_Normal;
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}
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