Yogi Wiguna
21 lines
688 B
Plaintext
21 lines
688 B
Plaintext
shader_type canvas_item;
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// Photoshop-style corner offsets in pixels
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uniform vec2 top_left = vec2(0.0);
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uniform vec2 top_right = vec2(0.0);
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uniform vec2 bottom_left = vec2(0.0);
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uniform vec2 bottom_right = vec2(0.0);
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void vertex() {
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// 1. Calculate UV based on the vertex position relative to size
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vec2 size = 1.0 / TEXTURE_PIXEL_SIZE;
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vec2 uv = VERTEX / size;
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// 2. Linear interpolation to find the offset for this specific vertex
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// This maps the square to whatever quadrilateral you define
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vec2 top_row = mix(top_left, top_right, uv.x);
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vec2 bottom_row = mix(bottom_left, bottom_right, uv.x);
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vec2 final_offset = mix(top_row, bottom_row, uv.y);
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VERTEX += final_offset;
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} |