48 lines
1.2 KiB
GLSL
48 lines
1.2 KiB
GLSL
uniform sampler2D displacement_tex;
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uniform sampler2D mask_tex;
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uniform sampler2D color_tex;
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#stk_include "utils/sp_texture_sampling.frag"
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uniform vec4 direction;
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in vec2 uv;
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in float camdist;
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out vec4 o_diffuse_color;
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const float maxlen = 0.02;
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void main()
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{
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float horiz = texture(displacement_tex, uv + direction.xy).x;
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float vert = texture(displacement_tex, (uv.yx + direction.zw) * vec2(0.9)).x;
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vec2 offset = vec2(horiz, vert);
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offset *= 2.0;
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offset -= 1.0;
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// Fade according to distance to cam
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float fade = 1.0 - smoothstep(1.0, 100.0, camdist);
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vec4 shiftval;
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shiftval.r = step(offset.x, 0.0) * -offset.x;
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shiftval.g = step(0.0, offset.x) * offset.x;
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shiftval.b = step(offset.y, 0.0) * -offset.y;
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shiftval.a = step(0.0, offset.y) * offset.y;
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vec2 shift;
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shift.x = -shiftval.x + shiftval.y;
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shift.y = -shiftval.z + shiftval.w;
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shift *= 0.02;
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vec2 tc = gl_FragCoord.xy / u_screen;
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float mask = texture(mask_tex, tc + shift).x;
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tc += (mask < 1.) ? vec2(0.) : shift;
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vec4 col = texture(color_tex, tc);
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vec4 blend_tex = sampleTextureSlot0(uv);
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col.rgb = blend_tex.rgb * blend_tex.a + (1. - blend_tex.a) * col.rgb;
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o_diffuse_color = vec4(col.rgb, 1.);
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}
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