mirror of
https://github.com/curioustorvald/Terrarum.git
synced 2026-03-07 12:21:52 +09:00
9aa4919bab
dirty way: loads dithered/passthru shader according to the game's config (boolean fxdither)
38 lines
853 B
GLSL
38 lines
853 B
GLSL
#version 120
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#ifdef GL_ES
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precision mediump float;
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#endif
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varying vec4 v_color;
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varying vec2 v_texCoords;
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uniform sampler2D u_texture;
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uniform vec3 topColor;
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uniform vec3 bottomColor;
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uniform float parallax = 0.0; // +1.0: all top col, -1.0: all bototm col, 0.0: normal grad
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uniform float parallax_size = 1.0/3.0; // 0: no parallax
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void main(void) {
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float scale = v_texCoords.y * (1.0 - parallax_size) + (parallax_size / 2.0) + (parallax * parallax_size / 2.0);
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float inR = mix(bottomColor.r, topColor.r, scale);
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float inG = mix(bottomColor.g, topColor.g, scale);
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float inB = mix(bottomColor.b, topColor.b, scale);
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gl_FragColor = vec4(inR, inG, inB, 1.0);
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}
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/*
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UV mapping coord.y
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-+ <- 1.0 =
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D| = // parallax of +1
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i| = =
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s| = // parallax of 0
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p| = =
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.| = // parallax of -1
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-+ <- 0.0 =
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*/ |