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Impostor and geometry changes for 3D clouds.

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This commit is contained in:
Stuart Buchanan 2011-12-17 19:12:38 +00:00
parent 9d8d7e15cc
commit 0c4b68a884
3 changed files with 10 additions and 18 deletions
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4
Effects/cloud.eff
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@ -57,10 +57,6 @@
<name>usrAttr2</name> <name>usrAttr2</name>
<index>11</index> <index>11</index>
</attribute> </attribute>
<attribute>
<name>usrAttr3</name>
<index>12</index>
</attribute>
</program> </program>
<uniform> <uniform>
<name>baseTexture</name> <name>baseTexture</name>

3
Shaders/3dcloud.frag
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@ -6,6 +6,7 @@ void main(void)
vec4 base = texture2D( baseTexture, gl_TexCoord[0].st); vec4 base = texture2D( baseTexture, gl_TexCoord[0].st);
vec4 finalColor = base * gl_Color; vec4 finalColor = base * gl_Color;
gl_FragColor.rgb = mix(gl_Fog.color.rgb, finalColor.rgb, fogFactor ); gl_FragColor.rgb = mix(gl_Fog.color.rgb, finalColor.rgb, fogFactor );
gl_FragColor.a = mix(0.0, finalColor.a, fogFactor); //gl_FragColor.a = mix(0.0, finalColor.a, fogFactor);
gl_FragColor.a = finalColor.a;
} }

21
Shaders/3dcloud.vert
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@ -7,21 +7,16 @@ uniform float range; // From /sim/rendering/clouds3d-vis-range
attribute vec3 usrAttr1; attribute vec3 usrAttr1;
attribute vec3 usrAttr2; attribute vec3 usrAttr2;
attribute vec3 usrAttr3;
float textureIndexX = usrAttr1.r; float shade_factor = usrAttr1.g;
float textureIndexY = usrAttr1.g; float cloud_height = usrAttr1.b;
float wScale = usrAttr1.b; float bottom_factor = usrAttr2.r;
float hScale = usrAttr2.r; float middle_factor = usrAttr2.g;
float shade_factor = usrAttr2.g; float top_factor = usrAttr2.b;
float cloud_height = usrAttr2.b;
float bottom_factor = usrAttr3.r;
float middle_factor = usrAttr3.g;
float top_factor = usrAttr3.b;
void main(void) void main(void)
{ {
gl_TexCoord[0] = gl_MultiTexCoord0 + vec4(textureIndexX, textureIndexY, 0.0, 0.0); gl_TexCoord[0] = gl_MultiTexCoord0;
vec4 ep = gl_ModelViewMatrixInverse * vec4(0.0,0.0,0.0,1.0); vec4 ep = gl_ModelViewMatrixInverse * vec4(0.0,0.0,0.0,1.0);
vec4 l = gl_ModelViewMatrixInverse * vec4(0.0,0.0,1.0,1.0); vec4 l = gl_ModelViewMatrixInverse * vec4(0.0,0.0,1.0,1.0);
vec3 u = normalize(ep.xyz - l.xyz); vec3 u = normalize(ep.xyz - l.xyz);
@ -36,8 +31,8 @@ void main(void)
// scaling in the homogeneous component of pos. // scaling in the homogeneous component of pos.
gl_Position = vec4(0.0, 0.0, 0.0, 1.0); gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
gl_Position.xyz = gl_Vertex.x * u; gl_Position.xyz = gl_Vertex.x * u;
gl_Position.xyz += gl_Vertex.y * r * wScale; gl_Position.xyz += gl_Vertex.y * r;
gl_Position.xyz += gl_Vertex.z * w * hScale; gl_Position.xyz += gl_Vertex.z * w;
// Apply Z scaling to allow sprites to be squashed in the z-axis // Apply Z scaling to allow sprites to be squashed in the z-axis
gl_Position.z = gl_Position.z * gl_Color.w; gl_Position.z = gl_Position.z * gl_Color.w;