<?xml version="1.0" encoding="utf-8"?>
<PropertyList>
	<name>Effects/terrain-default</name>
	<!-- <inherits-from>another-effect</inherits-from> -->
	<parameters>
		<material>
			<ambient type="vec4d">
				0.2 .2 0.2 1.0
			</ambient>
			<diffuse type="vec4d">
				.8 .8 .8 1.0
			</diffuse>
			<specular type="vec4d">
				0.0 0.0 0.0 1.0
			</specular>
			<emissive type="vec4d">
				0.0 0.0 0.0 1.0
			</emissive>
			<shininess>1.2</shininess>
		</material>
		<texture n="0">
			<image>Textures/Terrain/unknown.png</image>
			<filter>linear-mipmap-linear</filter>
			<!-- also repeat -->
			<wrap-s>repeat</wrap-s>
			<wrap-t>repeat</wrap-t>
			<!--
           <wrap-r>clamp-to-border</wrap-r>
           -->
			<!-- float, signed-integer, integer -->
			<internal-format>normalized</internal-format>
		</texture>
		<transparent>false</transparent>
		<render-bin>
			<bin-number>0</bin-number>
			<bin-name>RenderBin</bin-name>
		</render-bin>
		<visibility><use>/environment/ground-visibility-m</use></visibility>
		<avisibility><use>/environment/visibility-m</use></avisibility>
		<lthickness><use>/environment/ground-haze-thickness-m</use></lthickness>
		<scattering><use>/rendering/scene/scattering</use></scattering>
		<terminator><use>/environment/terminator-relative-position-m</use></terminator>
		<terrain_alt><use>/environment/mean-terrain-elevation-m</use></terrain_alt>
    		<overcast><use>/rendering/scene/overcast</use></overcast>
    		<eye_alt><use>/sim/rendering/eye-altitude-m</use></eye_alt>
		<fogtype><use>/sim/rendering/shaders/skydome</use></fogtype>
	</parameters>
	<!-- put techniques at a "high" index to allow derived effects to
       insert their own techniques first. -->
<technique n="7">
    <predicate>
      <and>
        <property>/sim/rendering/shaders/skydome</property>
        <or>
          <less-equal>
            <value type="float">2.0</value>
            <glversion/>
          </less-equal>
          <and>
            <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>
      <lighting>true</lighting>
      <material>
        <ambient><use>material/ambient</use></ambient>
        <diffuse><use>material/diffuse</use></diffuse>
        <specular><use>material/specular</use></specular>
        <emissive><use>material/emissive</use></emissive>
        <shininess><use>material/shininess</use></shininess>
        <color-mode>ambient-and-diffuse</color-mode>
      </material>
      <alpha-test><use>transparent</use></alpha-test>
      <shade-model>smooth</shade-model>
      <cull-face>back</cull-face>
      <render-bin>
        <bin-number>-1</bin-number>
        <bin-name>RenderBin</bin-name>
      </render-bin>
      <texture-unit>
        <unit>0</unit>
          <image><use>texture[0]/image</use></image>
          <filter><use>texture[0]/filter</use></filter>
          <wrap-s><use>texture[0]/wrap-s</use></wrap-s>
          <wrap-t><use>texture[0]/wrap-t</use></wrap-t>
          <internal-format>
            <use>texture[0]/internal-format</use>
          </internal-format>
      </texture-unit>
      <program>
	<vertex-shader n="0">Shaders/include_fog.vert</vertex-shader>
	<vertex-shader n="1">Shaders/default.vert</vertex-shader>
	<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
	<fragment-shader n="1">Shaders/terrain-nocolor.frag</fragment-shader>
      </program>
      <uniform>
        <name>texture</name>
        <type>sampler-2d</type>
        <value type="int">0</value>
      </uniform>
      <color-mask type="vec4d">0 0 0 0</color-mask>
    </pass>
    <pass>
      <lighting>true</lighting>
      <material>
        <ambient><use>material/ambient</use></ambient>
        <diffuse><use>material/diffuse</use></diffuse>
        <specular><use>material/specular</use></specular>
        <emissive><use>material/emissive</use></emissive>
        <shininess><use>material/shininess</use></shininess>
        <color-mode>ambient-and-diffuse</color-mode>
      </material>
      <blend><use>transparent</use></blend>
      <alpha-test><use>transparent</use></alpha-test>
      <shade-model>smooth</shade-model>
      <cull-face>back</cull-face>
      <render-bin>
        <bin-number><use>render-bin/bin-number</use></bin-number>
        <bin-name><use>render-bin/bin-name</use></bin-name>
      </render-bin>
      <texture-unit>
        <unit>0</unit>
          <image><use>texture[0]/image</use></image>
          <filter><use>texture[0]/filter</use></filter>
          <wrap-s><use>texture[0]/wrap-s</use></wrap-s>
          <wrap-t><use>texture[0]/wrap-t</use></wrap-t>
          <internal-format>
            <use>texture[0]/internal-format</use>
          </internal-format>
      </texture-unit>
      <program>
        <vertex-shader>Shaders/terrain-haze.vert</vertex-shader>
        <fragment-shader>Shaders/terrain-haze.frag</fragment-shader>
      </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>scattering</name>
        <type>float</type>
        <value><use>scattering</use></value>
      </uniform>
      <uniform>
        <name>terminator</name>
        <type>float</type>
        <value><use>terminator</use></value>
      </uniform>
      <uniform>
        <name>terrain_alt</name>
        <type>float</type>
        <value><use>terrain_alt</use></value>
      </uniform>
      <uniform>
        <name>overcast</name>
        <type>float</type>
        <value><use>overcast</use></value>
      </uniform>
     <uniform>
        <name>eye_alt</name>
        <type>float</type>
        <value><use>eye_alt</use></value>
      </uniform>
      <uniform>
        <name>texture</name>
        <type>sampler-2d</type>
        <value type="int">0</value>
      </uniform>
      <uniform>
        <name>colorMode</name>
        <type>int</type>
        <value>2</value> <!-- AMBIENT_AND_DIFFUSE -->
      </uniform>
      <depth>
        <function>lequal</function>
        <write-mask type="bool">false</write-mask>
      </depth>
    </pass>
  </technique>

<technique n="10">
		<predicate>
			<and>
				<property>/sim/rendering/shaders/generic</property>

				<or>
					<less-equal>
						<value type="float">2.0</value>
						<glversion/>
					</less-equal>
					<and>
						<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>
			<lighting>true</lighting>
			<material>
				<ambient>
					<use>material/ambient</use>
				</ambient>
				<diffuse>
					<use>material/diffuse</use>
				</diffuse>
				<specular>
					<use>material/specular</use>
				</specular>
				<emissive>
					<use>material/emissive</use>
				</emissive>
				<shininess>
					<use>material/shininess</use>
				</shininess>
				<color-mode>ambient-and-diffuse</color-mode>
			</material>
			<alpha-test>
				<use>transparent</use>
			</alpha-test>
			<shade-model>smooth</shade-model>
			<cull-face>back</cull-face>
			<render-bin>
				<bin-number>-1</bin-number>
				<bin-name>RenderBin</bin-name>
			</render-bin>
			<texture-unit>
				<unit>0</unit>
				<image>
					<use>texture[0]/image</use>
				</image>
				<filter>
					<use>texture[0]/filter</use>
				</filter>
				<wrap-s>
					<use>texture[0]/wrap-s</use>
				</wrap-s>
				<wrap-t>
					<use>texture[0]/wrap-t</use>
				</wrap-t>
				<internal-format>
					<use>texture[0]/internal-format</use>
				</internal-format>
			</texture-unit>
			<program>
				<vertex-shader n="0">Shaders/include_fog.vert</vertex-shader>
				<vertex-shader n="1">Shaders/default.vert</vertex-shader>
				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
				<fragment-shader n="1">Shaders/terrain-nocolor.frag</fragment-shader>
			</program>
			<uniform>
				<name>texture</name>
				<type>sampler-2d</type>
				<value type="int">0</value>
			</uniform>
			<color-mask type="vec4d">0 0 0 0</color-mask>
		</pass>
		<pass>
			<lighting>true</lighting>
			<material>
				<ambient>
					<use>material/ambient</use>
				</ambient>
				<diffuse>
					<use>material/diffuse</use>
				</diffuse>
				<specular>
					<use>material/specular</use>
				</specular>
				<emissive>
					<use>material/emissive</use>
				</emissive>
				<shininess>
					<use>material/shininess</use>
				</shininess>
				<color-mode>ambient-and-diffuse</color-mode>
			</material>
			<blend>
				<use>transparent</use>
			</blend>
			<alpha-test>
				<use>transparent</use>
			</alpha-test>
			<shade-model>smooth</shade-model>
			<cull-face>back</cull-face>
			<render-bin>
				<bin-number>
					<use>render-bin/bin-number</use>
				</bin-number>
				<bin-name>
					<use>render-bin/bin-name</use>
				</bin-name>
			</render-bin>
			<texture-unit>
				<unit>0</unit>
				<image>
					<use>texture[0]/image</use>
				</image>
				<filter>
					<use>texture[0]/filter</use>
				</filter>
				<wrap-s>
					<use>texture[0]/wrap-s</use>
				</wrap-s>
				<wrap-t>
					<use>texture[0]/wrap-t</use>
				</wrap-t>
				<internal-format>
					<use>texture[0]/internal-format</use>
				</internal-format>
			</texture-unit>
			<program>
				<vertex-shader>Shaders/include_fog.vert</vertex-shader>
				<vertex-shader>Shaders/default.vert</vertex-shader>
				<fragment-shader>Shaders/default.frag</fragment-shader>
				<fragment-shader>Shaders/include_fog.frag</fragment-shader>
			</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>scattering</name>
				<type>float</type>
				<value>
					<use>scattering</use>
				</value>
			</uniform>
			<uniform>
				<name>terminator</name>
				<type>float</type>
				<value>
					<use>terminator</use>
				</value>
			</uniform>
			<uniform>
				<name>fogType</name>
				<type>int</type>
				<value>
					<use>fogtype</use>
				</value>
			</uniform>
			<uniform>
				<name>texture</name>
				<type>sampler-2d</type>
				<value type="int">0</value>
			</uniform>
			<uniform>
				<name>colorMode</name>
				<type>int</type>
				<value>2</value>
				<!-- AMBIENT_AND_DIFFUSE -->
			</uniform>
			<depth>
				<function>lequal</function>
				<write-mask type="bool">false</write-mask>
			</depth>
		</pass>
	</technique>

	
	<technique n="11">
		<pass>
			<lighting>true</lighting>
			<material>
				<ambient>
					<use>material/ambient</use>
				</ambient>
				<diffuse>
					<use>material/diffuse</use>
				</diffuse>
				<specular>
					<use>material/specular</use>
				</specular>
				<emissive>
					<use>material/emissive</use>
				</emissive>
				<shininess>
					<use>material/shininess</use>
				</shininess>
				<color-mode>ambient-and-diffuse</color-mode>
			</material>
			<blend>
				<use>transparent</use>
			</blend>
			<alpha-test>
				<use>transparent</use>
			</alpha-test>
			<shade-model>smooth</shade-model>
			<cull-face>back</cull-face>
			<render-bin>
				<bin-number>
					<use>render-bin/bin-number</use>
				</bin-number>
				<bin-name>
					<use>render-bin/bin-name</use>
				</bin-name>
			</render-bin>
			<texture-unit>
				<unit>0</unit>
				<image>
					<use>texture[0]/image</use>
				</image>
				<filter>
					<use>texture[0]/filter</use>
				</filter>
				<wrap-s>
					<use>texture[0]/wrap-s</use>
				</wrap-s>
				<wrap-t>
					<use>texture[0]/wrap-t</use>
				</wrap-t>
				<internal-format>
					<use>texture[0]/internal-format</use>
				</internal-format>
				<environment>
					<mode>modulate</mode>
				</environment>
			</texture-unit>
		</pass>
	</technique>
</PropertyList>