26 lines
645 B
Forth
26 lines
645 B
Forth
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#version 330
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uniform sampler2D tex0;
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uniform sampler2D tex1;
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uniform float progress;
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in vec2 vsoTexCoord;
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out vec4 fragColor;
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void main() {
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vec2 center = vec2(.5);
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vec2 offset = vsoTexCoord - center;
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float angle = progress * radians(180) * 2;
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float sinTheta = sin(angle);
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float cosTheta = cos(angle);
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vec2 rotatedOffset = vec2(cosTheta * offset.x - sinTheta * offset.y, sinTheta * offset.x + cosTheta * offset.y);
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vec2 distortedTexCoord = center + rotatedOffset;
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vec4 color1 = texture(tex0, vsoTexCoord);
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vec4 color2 = texture(tex1, distortedTexCoord);
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fragColor = mix(color1, color2, smoothstep(0., 1., progress));
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}
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