17 lines
590 B
Plaintext
17 lines
590 B
Plaintext
/* A basic perspective camera. */
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shader camera(float focal_length = 90.0 [[ float min = 0.0,
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string unit = "mm",
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float sensitivity = 0.2 ]],
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output point position = 0.0,
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output vector direction = 0.0,
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output color throughput = 1.0)
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{
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vector sensor_size;
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getattribute("cam:sensor_size", sensor_size);
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point Pcam = camera_shader_raster_position() - point(0.5);
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Pcam *= sensor_size / focal_length;
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direction = normalize(vector(Pcam.x, Pcam.y, 1.0));
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}
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