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Support z-scaling in the 3d clouds- shader parts.

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Stuart Buchanan 2011-08-07 13:47:17 +01:00
parent 143eea87cd
commit 191a51d921
1 changed files with 3 additions and 5 deletions
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8
Shaders/3dcloud.vert
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@ -33,14 +33,12 @@ void main(void)
gl_Position.xyz += gl_Vertex.y * r * wScale;
gl_Position.xyz += gl_Vertex.z * w * hScale;
gl_Position.xyz += gl_Color.xyz;
// Apply Z scaling to allow sprites to be squashed in the z-axis
gl_Position.z = gl_Position.z * gl_Color.w;
// Determine a lighting normal based on the vertex position from the
// center of the cloud, so that sprite on the opposite side of the cloud to the sun are darker.
// fix flickering of 3d clouds on some macs
// http://code.google.com/p/flightgear-bugs/issues/detail?id=123
// float n = dot(normalize(-gl_LightSource[0].position.xyz),
// normalize(mat3x3(gl_ModelViewMatrix) * (- gl_Position.xyz)));;
float n = dot(normalize(-gl_LightSource[0].position.xyz),
normalize(vec3(gl_ModelViewMatrix * vec4(- gl_Position.xyz,0.0))));