25 lines
869 B
Plaintext
25 lines
869 B
Plaintext
shader_type canvas_item;
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uniform sampler2D flag_mask : source_color, hint_default_black;
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uniform vec4 team_color : source_color = vec4(1.0, 0.0, 0.0, 1.0); // red by default
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uniform float chroma_threshold : hint_range(0.0, 1.0) = 0.01;
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void fragment() {
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vec4 base = texture(TEXTURE, UV);
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// --- Chroma key: discard near-black pixels ---
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float max_channel = max(base.r, max(base.g, base.b));
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if (max_channel < chroma_threshold) {
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discard;
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}
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// --- Palette swap using masks ---
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float mask = texture(flag_mask, UV).r; // 1.0 on flag pixels, 0.0 on castle
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// Use the grey luminance as a brightness multiplier on the team color
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float brightness = base.r; // grey means R == G == B
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vec4 tinted = vec4(team_color.rgb * brightness * 2.0, base.a);
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// Blend: castle pixels stay grey, flag pixels get tinted
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COLOR = mix(base, tinted, mask);
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} |