blob: b15554bbb6a63618816fdb0a2763744f20fad144 (
plain)
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
|
/* ---- Instantiated Attrs ---- */
in vec2 pos;
/* ---- Per instance Attrs ---- */
/* Assumed to be in world coordinate already. */
in vec4 color;
in mat4 inst_obmat;
flat out vec4 finalColor;
flat out vec2 edgeStart;
noperspective out vec2 edgePos;
vec3 sphere_project(float ax, float az)
{
float sine = 1.0 - ax * ax - az * az;
float q3 = sqrt(max(0.0, sine));
return vec3(-az * q3, 0.5 - sine, ax * q3) * 2.0;
}
void main()
{
mat4 model_mat = inst_obmat;
model_mat[0][3] = model_mat[1][3] = model_mat[2][3] = 0.0;
model_mat[3][3] = 1.0;
vec2 amin = vec2(inst_obmat[0][3], inst_obmat[1][3]);
vec2 amax = vec2(inst_obmat[2][3], inst_obmat[3][3]);
vec3 final_pos = sphere_project(pos.x * abs((pos.x > 0.0) ? amax.x : amin.x),
pos.y * abs((pos.y > 0.0) ? amax.y : amin.y));
vec3 world_pos = (model_mat * vec4(final_pos, 1.0)).xyz;
gl_Position = point_world_to_ndc(world_pos);
finalColor = color;
edgeStart = edgePos = ((gl_Position.xy / gl_Position.w) * 0.5 + 0.5) * sizeViewport.xy;
#ifdef USE_WORLD_CLIP_PLANES
world_clip_planes_calc_clip_distance(world_pos);
#endif
}
|