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Add a sunlight technique to disable shadows, and avoid shader syntax problems with old NV cards

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This commit is contained in:
Frederic Bouvier 2012-04-04 20:42:05 +02:00
parent ceb1cb102b
commit 5678c1cd76
2 changed files with 111 additions and 1 deletions
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71
Effects/sunlight.eff
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@ -1,7 +1,10 @@
<?xml version="1.0" encoding="utf-8"?> <?xml version="1.0" encoding="utf-8"?>
<PropertyList> <PropertyList>
<name>Effects/sunlight</name> <name>Effects/sunlight</name>
<technique n="11"> <technique n="10">
<predicate>
<property>/sim/rendering/shadows/enabled</property>
</predicate>
<pass> <pass>
<lighting>false</lighting> <lighting>false</lighting>
<depth> <depth>
@ -76,5 +79,71 @@
--> -->
</pass> </pass>
</technique> </technique>
<technique n="11">
<pass>
<lighting>false</lighting>
<depth>
<enabled>false</enabled>
</depth>
<blend>
<source>one</source>
<destination>one</destination>
</blend>
<render-bin>
<bin-number>1</bin-number>
<bin-name>RenderBin</bin-name>
</render-bin>
<texture-unit>
<unit>0</unit>
<type>depth-buffer</type>
</texture-unit>
<texture-unit>
<unit>1</unit>
<type>normal-buffer</type>
</texture-unit>
<texture-unit>
<unit>2</unit>
<type>diffuse-buffer</type>
</texture-unit>
<texture-unit>
<unit>3</unit>
<type>spec-emis-buffer</type>
</texture-unit>
<program>
<vertex-shader>Shaders/sunlight.vert</vertex-shader>
<fragment-shader>Shaders/sunlight-noshadow.frag</fragment-shader>
</program>
<uniform>
<name>depth_tex</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>normal_tex</name>
<type>sampler-2d</type>
<value type="int">1</value>
</uniform>
<uniform>
<name>color_tex</name>
<type>sampler-2d</type>
<value type="int">2</value>
</uniform>
<uniform>
<name>spec_emis_tex</name>
<type>sampler-2d</type>
<value type="int">3</value>
</uniform>
<!-- The following uniforms are automatically defined and initialized :
- fg_SunAmbientColor
- fg_SunDiffuseColor
- fg_SunSpecularColor
- fg_SunDirection
- fg_ProjectionMatrixInverse
- fg_ViewMatrixInverse
- fg_ViewMatrix
- fg_Planes
-->
</pass>
</technique>
</PropertyList> </PropertyList>

41
Shaders/sunlight-noshadow.frag Normal file
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@ -0,0 +1,41 @@
uniform mat4 fg_ViewMatrix;
uniform sampler2D depth_tex;
uniform sampler2D normal_tex;
uniform sampler2D color_tex;
uniform sampler2D spec_emis_tex;
uniform vec4 fg_SunDiffuseColor;
uniform vec4 fg_SunSpecularColor;
uniform vec3 fg_SunDirection;
uniform vec3 fg_Planes;
varying vec3 ray;
void main() {
vec2 coords = gl_TexCoord[0].xy;
vec4 spec_emis = texture2D( spec_emis_tex, coords );
if ( spec_emis.a < 0.1 )
discard;
vec3 normal;
normal.xy = texture2D( normal_tex, coords ).rg * 2.0 - vec2(1.0,1.0);
normal.z = sqrt( 1.0 - dot( normal.xy, normal.xy ) );
float len = length(normal);
normal /= len;
vec3 viewDir = normalize(ray);
float depth = texture2D( depth_tex, coords ).r;
vec3 pos;
pos.z = - fg_Planes.y / (fg_Planes.x + depth * fg_Planes.z);
pos.xy = viewDir.xy / viewDir.z * pos.z;
vec4 tint;
vec3 lightDir = (fg_ViewMatrix * vec4( fg_SunDirection, 0.0 )).xyz;
lightDir = normalize( lightDir );
vec3 color = texture2D( color_tex, coords ).rgb;
vec3 Idiff = clamp( dot( lightDir, normal ), 0.0, 1.0 ) * color * fg_SunDiffuseColor.rgb;
vec3 halfDir = lightDir - viewDir;
len = length( halfDir );
vec3 Ispec = vec3(0.0);
vec3 Iemis = spec_emis.z * color;
if (len > 0.0001) {
halfDir /= len;
Ispec = pow( clamp( dot( halfDir, normal ), 0.0, 1.0 ), spec_emis.y * 255.0 ) * spec_emis.x * fg_SunSpecularColor.rgb;
}
gl_FragColor = vec4(Idiff + Ispec + Iemis, 1.0);
}