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Updated shaders and effects for 3D clouds using single Drawable per cloud rather than per sprite.

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This commit is contained in:
Stuart Buchanan 2012-01-17 22:19:53 +00:00
parent 4126b3f592
commit fa933eda6e
3 changed files with 9 additions and 18 deletions
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4
Effects/cloud.eff
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@ -57,10 +57,6 @@
<name>usrAttr2</name>
<index>11</index>
</attribute>
<attribute>
<name>usrAttr3</name>
<index>12</index>
</attribute>
</program>
<uniform>
<name>baseTexture</name>

2
Shaders/3dcloud.frag
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@ -6,6 +6,6 @@ void main(void)
vec4 base = texture2D( baseTexture, gl_TexCoord[0].st);
vec4 finalColor = base * gl_Color;
gl_FragColor.rgb = mix(gl_Fog.color.rgb, finalColor.rgb, 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 usrAttr2;
attribute vec3 usrAttr3;
float textureIndexX = usrAttr1.r;
float textureIndexY = usrAttr1.g;
float wScale = usrAttr1.b;
float hScale = usrAttr2.r;
float shade_factor = usrAttr2.g;
float cloud_height = usrAttr2.b;
float bottom_factor = usrAttr3.r;
float middle_factor = usrAttr3.g;
float top_factor = usrAttr3.b;
float shade_factor = usrAttr1.g;
float cloud_height = usrAttr1.b;
float bottom_factor = usrAttr2.r;
float middle_factor = usrAttr2.g;
float top_factor = usrAttr2.b;
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 l = gl_ModelViewMatrixInverse * vec4(0.0,0.0,1.0,1.0);
vec3 u = normalize(ep.xyz - l.xyz);
@ -36,8 +31,8 @@ void main(void)
// scaling in the homogeneous component of pos.
gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
gl_Position.xyz = gl_Vertex.x * u;
gl_Position.xyz += gl_Vertex.y * r * wScale;
gl_Position.xyz += gl_Vertex.z * w * hScale;
gl_Position.xyz += gl_Vertex.y * r;
gl_Position.xyz += gl_Vertex.z * w;
// Apply Z scaling to allow sprites to be squashed in the z-axis
gl_Position.z = gl_Position.z * gl_Color.w;