fae 0.6.0

A simple and fast 2D rendering crate with optional window creation and text rendering functionality.
Documentation 
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

// Version preprocessor automatically added by fae, either 300 es or 330.

// Per-vertex attributes:
in vec2 shared_position;
in vec2 shared_texcoord;
// Per-instance attributes:
in vec4 position;
in vec4 texcoord;
in vec4 color;
in vec3 rotation;
in float depth;

out vec2 frag_texcoord;
out vec4 frag_color;
uniform mat4 projection_matrix;

void main(void) {
    float rot_radians = rotation.x;
    vec4 vertex_pos = vec4(shared_position * position.zw - rotation.yz, depth, 1.0);
    float cos_r = cos(rot_radians);
    float sin_r = sin(rot_radians);
    vertex_pos.xy = vec2(cos_r * vertex_pos.x - sin_r * vertex_pos.y,
                         sin_r * vertex_pos.x + cos_r * vertex_pos.y);
    vertex_pos.xy += position.xy + rotation.yz;
    gl_Position = vertex_pos * projection_matrix;
    if (texcoord == vec4(-1.0, -1.0, -2.0, -2.0)) {
        frag_texcoord = vec2(-1.0, -1.0);
    } else {
        frag_texcoord = texcoord.xy + shared_texcoord.xy * texcoord.zw;
    }
    frag_color = color;
}