81 lines
1.9 KiB
GLSL
81 lines
1.9 KiB
GLSL
#version 120
|
|
#extension GL_EXT_geometry_shader4 : enable
|
|
|
|
varying in vec4 rawposIn[];
|
|
varying in vec3 NormalIn[];
|
|
varying in vec3 VTangentIn[];
|
|
varying in vec3 VBinormalIn[];
|
|
|
|
varying out vec4 rawpos;
|
|
varying out vec4 ecPosition;
|
|
varying out vec3 VNormal;
|
|
varying out vec3 VTangent;
|
|
varying out vec3 VBinormal;
|
|
varying out vec3 Normal;
|
|
varying out vec4 constantColor;
|
|
varying out float bump;
|
|
|
|
uniform float canopy_height;
|
|
|
|
void createVertex(int i, int j, float offset, float s)
|
|
{
|
|
rawpos = rawposIn[i] + offset * vec4(NormalIn[i], 0.0);
|
|
ecPosition = gl_ModelViewMatrix * rawpos;
|
|
if ( s == 0.0 )
|
|
{
|
|
vec4 v;
|
|
if (j < i)
|
|
{
|
|
v = rawposIn[j] - rawposIn[i];
|
|
Normal = normalize(cross( NormalIn[i], v.xyz ));
|
|
}
|
|
else
|
|
{
|
|
v = rawposIn[i] - rawposIn[j];
|
|
Normal = normalize(cross( NormalIn[j], v.xyz ));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Normal = NormalIn[i];
|
|
}
|
|
VNormal = normalize(gl_NormalMatrix * Normal);
|
|
VTangent = VTangentIn[i];
|
|
VBinormal = VBinormalIn[i];
|
|
bump = s;
|
|
|
|
gl_FrontColor = gl_FrontColorIn[i];
|
|
constantColor = gl_FrontMaterial.emission
|
|
+ gl_FrontColorIn[i] * (gl_LightModel.ambient + gl_LightSource[0].ambient);
|
|
gl_Position = gl_ProjectionMatrix * ecPosition;
|
|
gl_TexCoord[0] = gl_TexCoordIn[i][0];
|
|
EmitVertex();
|
|
}
|
|
|
|
void main(void)
|
|
{
|
|
createVertex(0, 1, canopy_height, 0.0);
|
|
createVertex(0, 1, 0.0, 0.0);
|
|
createVertex(1, 0, canopy_height, 0.0);
|
|
createVertex(1, 0, 0.0, 0.0);
|
|
EndPrimitive();
|
|
createVertex(1, 2, canopy_height, 0.0);
|
|
createVertex(1, 2, 0.0, 0.0);
|
|
createVertex(2, 1, canopy_height, 0.0);
|
|
createVertex(2, 1, 0.0, 0.0);
|
|
EndPrimitive();
|
|
createVertex(2, 0, canopy_height, 0.0);
|
|
createVertex(2, 0, 0.0, 0.0);
|
|
createVertex(0, 2, canopy_height, 0.0);
|
|
createVertex(0, 2, 0.0, 0.0);
|
|
EndPrimitive();
|
|
|
|
createVertex(0, 1, canopy_height, 1.0);
|
|
createVertex(1, 2, canopy_height, 1.0);
|
|
createVertex(2, 0, canopy_height, 1.0);
|
|
EndPrimitive();
|
|
createVertex(0, 1, 0.0, 0.0);
|
|
createVertex(1, 2, 0.0, 0.0);
|
|
createVertex(2, 0, 0.0, 0.0);
|
|
EndPrimitive();
|
|
}
|