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fgdata/Effects/scenery-lights.eff

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Shader-based scenery lights. This commit implements shader-based scenery lights with support for efficient rendering of a large number of lights, animations and directionality. Detailed commit log can be found at [1]. Detailed discussions can be found on the mailing list [2][3][4]. [1] https://sourceforge.net/u/fahimdalvi/fgdata/ci/feat/scenery-shader-lights/~/tree/ [2] (Timed animation stops working in certain configurations) https://sourceforge.net/p/flightgear/mailman/flightgear-devel/thread/4A7AC359-63B3-4D8A-815B-09823BCEFF27%40gmail.com/#msg37095923 [3] (Shader-based scenery lights) https://sourceforge.net/p/flightgear/mailman/flightgear-devel/thread/63E3C131-7662-4F59-B2E6-03208C78EF96%40gmail.com/#msg37190517 [4] (Shader-based scenery lights Part 2) https://sourceforge.net/p/flightgear/mailman/flightgear-devel/thread/74F18179-CA34-4901-A44E-15498ECC230A%40gmail.com/#msg37331695
2021-08-07 18:42:20 +00:00
<?xml version="1.0" encoding="utf-8"?>
<PropertyList>
<name>Effects/scenery-lights</name>
<parameters>
<texture n="0">
<type>light-sprite</type>
<wrap-s>clamp</wrap-s>
<wrap-t>clamp</wrap-t>
</texture>
<visibility><use>/environment/ground-visibility-m</use></visibility>
<avisibility><use>/environment/visibility-m</use></avisibility>
<lthickness><use>/environment/ground-haze-thickness-m</use></lthickness>
<eye_alt><use>/sim/rendering/eye-altitude-m</use></eye_alt>
<terminator><use>/environment/terminator-relative-position-m</use></terminator>
<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
<sun_angle><use>/sim/time/sun-angle-rad</use></sun_angle>
</parameters>
<technique n="10">
<!-- ALS -->
<predicate>
<and>
<property>/sim/rendering/point-sprites</property>
<or>
<property>/sim/rendering/shaders/skydome</property>
<property>/sim/rendering/shaders/use-shaders</property>
</or>
<or>
<less-equal>
<value type="float">2.0</value>
<glversion/>
</less-equal>
<and>
<extension-supported>GL_ARB_point_sprite</extension-supported>
<extension-supported>GL_ARB_point_parameters</extension-supported>
<extension-supported>GL_ARB_shader_objects</extension-supported>
<extension-supported>GL_ARB_shading_language_100</extension-supported>
<extension-supported>GL_ARB_vertex_shader</extension-supported>
<extension-supported>GL_ARB_fragment_shader</extension-supported>
</and>
</or>
</and>
</predicate>
<pass>
<render-bin>
<bin-number>8</bin-number>
<bin-name>DepthSortedBin</bin-name>
</render-bin>
<lighting>false</lighting>
<blend>
<source>src-alpha</source>
<destination>one-minus-src-alpha</destination>
</blend>
<depth>
<write-mask>false</write-mask>
</depth>
<cull-face>off</cull-face>
<polygon-mode>
<front>point</front>
<back>point</back>
</polygon-mode>
<texture-unit>
<unit>0</unit>
<point-sprite>true</point-sprite>
<type><use>texture[0]/type</use></type>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
<program>
<vertex-shader>Shaders/scenery-lights.vert</vertex-shader>
<fragment-shader>Shaders/scenery-lights.frag</fragment-shader>
<fragment-shader>Shaders/noise.frag</fragment-shader>
<attribute>
<name>lightParams</name>
<index>11</index>
</attribute>
<attribute>
<name>animationParams</name>
<index>12</index>
</attribute>
<attribute>
<name>directionParams1</name>
<index>13</index>
</attribute>
<attribute>
<name>directionParams2</name>
<index>14</index>
</attribute>
</program>
<uniform>
<name>visibility</name>
<type>float</type>
<value><use>visibility</use></value>
</uniform>
<uniform>
<name>avisibility</name>
<type>float</type>
<value><use>avisibility</use></value>
</uniform>
<uniform>
<name>hazeLayerAltitude</name>
<type>float</type>
<value><use>lthickness</use></value>
</uniform>
<uniform>
<name>eye_alt</name>
<type>float</type>
<value><use>eye_alt</use></value>
</uniform>
<uniform>
<name>use_night_vision</name>
<type>bool</type>
<value><use>use_night_vision</use></value>
</uniform>
<uniform>
<name>use_IR_vision</name>
<type>bool</type>
<value><use>use_IR_vision</use></value>
</uniform>
<uniform>
<name>sun_angle</name>
<type>float</type>
<value><use>sun_angle</use></value>
</uniform>
<uniform>
<name>texture</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>terminator</name>
<type>float</type>
<value><use>terminator</use></value>
</uniform>
<vertex-program-point-size>true</vertex-program-point-size>
</pass>
</technique>
<technique n="17">
<!-- Combined technique -->
<predicate>
<and>
<property>/sim/rendering/point-sprites</property>
<or>
<less-equal>
<value type="float">2.0</value>
<glversion/>
</less-equal>
<and>
<extension-supported>GL_ARB_point_sprite</extension-supported>
<extension-supported>GL_ARB_point_parameters</extension-supported>
</and>
</or>
</and>
</predicate>
<pass>
<render-bin>
<bin-number>8</bin-number>
<bin-name>DepthSortedBin</bin-name>
</render-bin>
<lighting>false</lighting>
<depth>
<write-mask>false</write-mask>
</depth>
<blend>
<source>src-alpha</source>
<destination>one-minus-src-alpha</destination>
</blend>
<alpha-test>
<comparison>gequal</comparison>
<reference type="float">0.1</reference>
</alpha-test>
<cull-face>back</cull-face>
<polygon-mode>
<front>point</front>
</polygon-mode>
<point>
<min-size><use>min-size</use></min-size>
<max-size><use>max-size</use></max-size>
<size><use>size</use></size>
<attenuation><use>attenuation</use></attenuation>
</point>
<texture-unit>
<unit>0</unit>
<point-sprite>true</point-sprite>
<type><use>texture[0]/type</use></type>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
</pass>
</technique>
<technique n="18">
<!-- Sprite technique -->
<predicate>
<and>
<property>/sim/rendering/point-sprites</property>
<or>
<less-equal>
<value type="float">2.0</value>
<glversion/>
</less-equal>
<extension-supported>GL_ARB_point_sprite</extension-supported>
</or>
</and>
</predicate>
<pass>
<render-bin>
<bin-number>8</bin-number>
<bin-name>DepthSortedBin</bin-name>
</render-bin>
<lighting>false</lighting>
<depth>
<write-mask>false</write-mask>
</depth>
<blend>
<source>src-alpha</source>
<destination>one-minus-src-alpha</destination>
</blend>
<cull-face><use>cull-face</use></cull-face>
<polygon-mode>
<front>point</front>
</polygon-mode>
<texture-unit>
<unit>0</unit>
<point-sprite>true</point-sprite>
<type><use>texture[0]/type</use></type>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
</pass>
</technique>
<technique n="19">
<!-- Attenuation technique -->
<predicate>
<and>
<or>
<less-equal>
<value type="float">2.0</value>
<glversion/>
</less-equal>
<extension-supported>GL_ARB_point_parameters</extension-supported>
</or>
</and>
</predicate>
<pass>
<point>
<min-size><use>min-size</use></min-size>
<max-size><use>max-size</use></max-size>
<size><use>size</use></size>
<attenuation><use>attenuation</use></attenuation>
</point>
<render-bin>
<bin-number>8</bin-number>
<bin-name>DepthSortedBin</bin-name>
</render-bin>
<depth>
<write-mask>false</write-mask>
</depth>
<blend>
<source>src-alpha</source>
<destination>one-minus-src-alpha</destination>
</blend>
<lighting>false</lighting>
<cull-face><use>cull-face</use></cull-face>
<polygon-mode>
<front>point</front>
<back>point</back>
</polygon-mode>
</pass>
</technique>
<technique n="20">
<!-- Basic technique -->
<pass>
<render-bin>
<bin-number>8</bin-number>
<bin-name>DepthSortedBin</bin-name>
</render-bin>
<lighting>false</lighting>
<depth>
<write-mask>false</write-mask>
</depth>
<blend>
<source>src-alpha</source>
<destination>one-minus-src-alpha</destination>
</blend>
<cull-face><use>cull-face</use></cull-face>
<polygon-mode>
<front>point</front>
</polygon-mode>
</pass>
</technique>
</PropertyList>
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