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35
modules/wallpaper-engine/shaders/orthogrid.frag
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35
modules/wallpaper-engine/shaders/orthogrid.frag
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uniform float g_Time;
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varying vec2 v_TexCoord;
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varying vec4 v_ViewRect;
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void main() {
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vec4 color = vec4(0, 0, 0, 0);
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float s = sin((v_TexCoord.y - v_TexCoord.x) * 0.035 /*+ g_Time*/);
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vec4 grid = vec4(1, 1, 0, 0.2) * smoothstep(0.7, 0.8, abs(s));
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float f = (step(v_TexCoord.x, v_ViewRect.x) + step(v_ViewRect.z, v_TexCoord.x)) +
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(step(v_TexCoord.y, v_ViewRect.y) + step(v_ViewRect.w, v_TexCoord.y));
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color = mix(color, grid, saturate(f));
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float borderWidth = 10.0f;
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float rightBorder = step(v_ViewRect.x - borderWidth, v_TexCoord.x) * step(v_TexCoord.x, v_ViewRect.x) +
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step(v_ViewRect.z, v_TexCoord.x) * step(v_TexCoord.x, v_ViewRect.z + borderWidth);
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float rightBorderMask = step(v_TexCoord.y, v_ViewRect.w + borderWidth) * step(v_ViewRect.y - borderWidth, v_TexCoord.y);
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float leftBorder = step(v_ViewRect.y - borderWidth, v_TexCoord.y) * step(v_TexCoord.y, v_ViewRect.y) +
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step(v_ViewRect.w, v_TexCoord.y) * step(v_TexCoord.y, v_ViewRect.w + borderWidth);
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float leftBorderMask = step(v_TexCoord.x, v_ViewRect.z + borderWidth) * step(v_ViewRect.x - borderWidth, v_TexCoord.x);
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float border = rightBorder * rightBorderMask + leftBorder * leftBorderMask;
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color = mix(color, vec4(1, 1, 0, 0.5), saturate(border));
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gl_FragColor = color;
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}
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