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25 lines
557 B
GLSL
25 lines
557 B
GLSL
// VERTEX_SHADER:
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// cross_fade.glsl
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void main() {
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gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
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vUv = vec2(aUv.x, aUv.y);
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}
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// FRAGMENT_SHADER:
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// cross_fade.glsl
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uniform float u_progress;
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uniform sampler2D u_source2;
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void main() {
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vec4 source1 = GskTexture(u_source, vUv); // start child
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vec4 source2 = GskTexture(u_source2, vUv); // end child
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float p_start = (1.0 - u_progress) * u_alpha;
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float p_end = u_progress * u_alpha;
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vec4 color = (p_start * source1) + (p_end * source2);
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gskSetOutputColor(color);
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}
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