44 lines
1.1 KiB
GLSL
44 lines
1.1 KiB
GLSL
#version 450
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layout (binding = 1) uniform sampler2D samplerColor;
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layout (location = 0) in vec2 inUV;
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layout (location = 1) in vec3 inNormal;
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layout(push_constant) uniform PushConstants {
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float zoom;
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float r;
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float g;
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float b;
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float radius;
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float ux;
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float uy;
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} pushConstants;
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layout (location = 0) out vec4 outFragColor;
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void main()
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{
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// outFragColor = color;
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// 获取当前片元的屏幕坐标（左下角为原点）
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vec2 fragCoord = gl_FragCoord.xy;
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// 屏幕中心（480x480 的中心是 (240, 240)）
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vec2 center = vec2(240.0, 240.0);
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// 计算到中心的距离（欧氏距离，单位：像素）
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float dist = length(fragCoord - center);
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// 判断是否在半径之外
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if (dist > pushConstants.radius) {
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// 使用 push constant 中的 RGB 颜色（注意 alpha 设为 1.0）
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outFragColor = vec4(pushConstants.r, pushConstants.g, pushConstants.b, 1.0);
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} else {
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vec2 pos = vec2(pushConstants.ux/4096.f, pushConstants.uy/2048.f);
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vec2 uv = pos + vec2(inUV.x/8.f, inUV.y/4.f);
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vec4 color = texture(samplerColor, uv);
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outFragColor = color;
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}
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} |