39 lines
782 B
GLSL
39 lines
782 B
GLSL
#ifdef GLES
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precision highp float;
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#endif
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attribute vec4 vertex;
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attribute vec2 tex_coord;
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uniform mat4 u_mv;
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uniform mat4 u_proj;
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uniform float u_scale;
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uniform float u_coord_scale;
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uniform vec2 u_div;
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varying vec2 tex_c;
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void
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main(){
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vec4 pos;
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vec2 dir = vertex.zw;
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float coord_scale = 1.0 / u_coord_scale;
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if (abs(mod(vertex.x, 2.0)) == 0.0) {
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pos = u_proj * (u_mv * vec4(vertex.xy + dir * u_scale, 0.0, 1.0));
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}
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else { // place as billboard
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vec4 center = u_mv * vec4(vertex.xy, 0.0, 1.0);
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pos = u_proj * (center + vec4(dir * coord_scale, 0.0, 0.0));
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}
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gl_Position = pos;
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tex_c = tex_coord * u_div;
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}
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$$
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#ifdef GLES
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precision highp float;
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#endif
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uniform sampler2D tex;
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varying vec2 tex_c;
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void
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main(){
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gl_FragColor = texture2D(tex, tex_c.xy);
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}
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