blob: 5dd3f56cd04cfcb9b2cdf9ef31ed57df700fe579 (
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
|
#ifdef GL_ES
precision mediump float;
#endif
attribute vec2 a_position;
attribute vec2 a_texCoord;
uniform float u_time;
uniform vec4 u_viewbox; // [x, y, width, height]
uniform vec2 u_resolution;
uniform mat3 u_trans;
varying vec2 v_pos;
varying vec2 v_texCoord;
void main() {
vec3 pos = vec3(a_position, 1.0);
pos = u_trans * pos;
vec2 uv = pos.xy;
// Viewbox's center is top left, a_position's is in the center to the screen
// So translate and scale the viewbox**
uv -= u_viewbox.xy + (u_viewbox.zw * 0.5);
uv /= u_viewbox.zw * 0.5;
v_pos = (uv.xy + 1.0) * 0.5;
gl_Position = vec4(uv.xy, 0.0, 1.0);
v_texCoord = a_texCoord;
}
|
