62 lines
1.3 KiB
GLSL
62 lines
1.3 KiB
GLSL
#include "transform/polar.glsl"
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layout(points) in;
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layout(triangle_strip, max_vertices = 4) out;
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// conf: Range, Elevation, Resolution, 0.0
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uniform vec4 conf;
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in float in_value[];
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out float x;
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out float y;
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out float value;
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flat out vec4 vrange;
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void main() {
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vec4 reso = vec4(conf.x/2.0, conf.y/2.0 * radian, 0.0, 0.0);
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vec4 loc;
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float c = cos(reso.y);
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vec4 po = gl_in[0].gl_Position;
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po.y = po.y * radian;
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vrange = vec4(po.x - reso.x, po.y - reso.y, po.x + reso.x, po.y + reso.y);
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value = in_value[0];
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gl_Position = po - reso;
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loc = forward(gl_Position);
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x = loc.x;
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y = loc.y;
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gl_Position = <transform(loc)>;
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EmitVertex();
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gl_Position = po + vec4(reso.x, -reso.y, 0.0, 0.0);
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gl_Position.x = gl_Position.x / c;
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loc = forward(gl_Position);
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x = loc.x;
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y = loc.y;
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gl_Position = <transform(loc)>;
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EmitVertex();
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gl_Position = po + vec4(-reso.x, reso.y, 0.0, 0.0);
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loc = forward(gl_Position);
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x = loc.x;
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y = loc.y;
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gl_Position = <transform(loc)>;
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EmitVertex();
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gl_Position = po + reso;
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gl_Position.x = gl_Position.x / c;
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loc = forward(gl_Position);
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x = loc.x;
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y = loc.y;
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gl_Position = <transform(loc)>;
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EmitVertex();
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EndPrimitive();
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}
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