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Make the number of shadow cascades and the range of each configurable

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Frederic Bouvier 2012-04-17 09:12:57 +02:00
parent e09670ea33
commit e4b856805e
3 changed files with 16 additions and 5 deletions
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2
Effects/sunlight.eff
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@ -77,6 +77,8 @@
- fg_ViewMatrixInverse
- fg_ViewMatrix
- fg_Planes
- fg_ShadowNumber
- fg_ShadowDistances
-->
</pass>
</technique>

14
Shaders/sunlight.frag
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@ -8,6 +8,8 @@ uniform vec4 fg_SunDiffuseColor;
uniform vec4 fg_SunSpecularColor;
uniform vec3 fg_SunDirection;
uniform vec3 fg_Planes;
uniform int fg_ShadowNumber;
uniform vec4 fg_ShadowDistances;
varying vec3 ray;
vec3 position( vec3 viewdir, float depth );
@ -18,18 +20,20 @@ vec4 DynamicShadow( in vec4 ecPosition, out vec4 tint )
vec4 coords;
vec2 shift = vec2( 0.0 );
int index = 4;
if (ecPosition.z > -5.0) {
float factor = 0.5;
if (ecPosition.z > -fg_ShadowDistances.x) {
index = 1;
factor = 1.0;
tint = vec4(0.0,1.0,0.0,1.0);
} else if (ecPosition.z > -50.0) {
} else if (ecPosition.z > -fg_ShadowDistances.y && fg_ShadowNumber > 1) {
index = 2;
shift = vec2( 0.0, 0.5 );
tint = vec4(0.0,0.0,1.0,1.0);
} else if (ecPosition.z > -512.0) {
} else if (ecPosition.z > -fg_ShadowDistances.z && fg_ShadowNumber > 2) {
index = 3;
shift = vec2( 0.5, 0.0 );
tint = vec4(1.0,1.0,0.0,1.0);
} else if (ecPosition.z > -10000.0) {
} else if (ecPosition.z > -fg_ShadowDistances.w && fg_ShadowNumber > 3) {
shift = vec2( 0.5, 0.5 );
tint = vec4(1.0,0.0,0.0,1.0);
} else {
@ -39,7 +43,7 @@ vec4 DynamicShadow( in vec4 ecPosition, out vec4 tint )
coords.t = dot( ecPosition, gl_EyePlaneT[index] );
coords.p = dot( ecPosition, gl_EyePlaneR[index] );
coords.q = dot( ecPosition, gl_EyePlaneQ[index] );
coords.st *= .5;
coords.st *= factor;
coords.st += shift;
return coords;
}

5
preferences.xml
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@ -182,6 +182,11 @@ Started September 2000 by David Megginson, david@megginson.com
<debug type="bool"
userarchive="y">false</debug>
<map-size type="int">4096</map-size>
<num-cascades type="int">4</num-cascades>
<cascade-far-m index="0" type="float">5.0</cascade-far-m>
<cascade-far-m index="1" type="float">50.0</cascade-far-m>
<cascade-far-m index="2" type="float">500.0</cascade-far-m>
<cascade-far-m index="3" type="float">5000.0</cascade-far-m>
</shadows>
<shader-experimental type="bool"
userarchive="y">false</shader-experimental>