1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
#version 410 core
uniform mat4 projMat;
uniform mat4 viewMat;
uniform mat4 treeMat; // world-transform
uniform vec3 cameraDirX; // needed for bush-type trees
uniform vec3 cameraDirY;
uniform vec3 groundAmbientColor;
uniform vec3 groundDiffuseColor;
uniform vec2 alphaModifiers; // (tree-height alpha, ground-diffuse alpha)
uniform vec3 fogParams; // .x := start, .y := end, .z := viewrange
layout(location = 0) in vec3 vtxPositionAttr;
layout(location = 1) in vec2 vtxTexCoordAttr;
layout(location = 2) in vec3 vtxNormalAttr;
out vec4 vVertexPos;
out vec2 vTexCoord;
out vec4 vBaseColor;
out float vFogFactor;
void main() {
vec4 vertexPos = vec4(vtxPositionAttr, 1.0);
vertexPos.xyz += (cameraDirX * vtxNormalAttr.x);
vertexPos.xyz += (cameraDirY * vtxNormalAttr.y);
#if (TREE_SHADOW == 1)
vVertexPos = treeMat * vertexPos;
#endif
vBaseColor.rgb = (vtxNormalAttr.z * groundDiffuseColor.rgb) + groundAmbientColor.rgb;
vBaseColor.a = (vtxPositionAttr.y * alphaModifiers.x) + alphaModifiers.y;
vTexCoord = vtxTexCoordAttr;
gl_Position = projMat * viewMat * treeMat * vertexPos;
{
float eyeDepth = length((viewMat * treeMat * vertexPos).xyz);
float fogRange = (fogParams.y - fogParams.x) * fogParams.z;
float fogDepth = (eyeDepth - fogParams.x * fogParams.z) / fogRange;
// float fogDepth = (fogParams.y * fogParams.z - eyeDepth) / fogRange;
vFogFactor = 1.0 - clamp(fogDepth, 0.0, 1.0);
// vFogFactor = clamp(fogDepth, 0.0, 1.0);
}
}
|
