blob: f72c4c5a9e7530ea5e90192fb48a26a727c4b17a (
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
|
uniform float size;
#if __VERSION__ == 120
attribute vec2 pos;
varying vec2 radii;
#else
in vec2 pos;
out vec2 radii;
#endif
void main() {
gl_Position = gl_ModelViewProjectionMatrix * vec4(pos, 0.0, 1.0);
gl_PointSize = size;
// calculate concentric radii in pixels
float radius = 0.5 * size;
// start at the outside and progress toward the center
radii[0] = radius;
radii[1] = radius - 1.0;
// convert to PointCoord units
radii /= size;
}
|