34 lines
736 B
GLSL
34 lines
736 B
GLSL
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uniform mat4 projMat;
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uniform vec2 texSizeInv;
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uniform vec2 translation;
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uniform vec2 aniOffset;
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attribute vec2 position;
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attribute vec2 texCoord;
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varying vec2 v_texCoord;
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const vec2 atAreaA = vec2(9.0*32.0, 12.0*32.0);
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const float atAreaCX = 12.0*32.0;
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const float atAreaCW = 4.0*32.0;
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void main()
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{
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vec2 tex = texCoord;
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lowp float pred;
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/* Type A autotiles shift horizontally */
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pred = float(tex.x <= atAreaA.x && tex.y <= atAreaA.y);
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tex.x += aniOffset.x * pred;
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/* Type C autotiles shift vertically */
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pred = float(tex.x >= atAreaCX && tex.x <= (atAreaCX+atAreaCW) && tex.y <= atAreaA.y);
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tex.y += aniOffset.y * pred;
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gl_Position = projMat * vec4(position + translation, 0, 1);
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v_texCoord = tex * texSizeInv;
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}
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