mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-04-22 02:48:25 -05:00
Jonas Strandstedt
a4a528375b
- Added hack in VolumeRaycasteBox for SGCT Left/Right clearing - Fixed quad dimensions to depend on viewport size - Updated RenderableVolumeExpert to render correctly - Small changes to SceneGraph to make it easier to switch between volume rendering and Earth
29 lines
750 B
Common Lisp
29 lines
750 B
Common Lisp
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float3 CartesianToSpherical(float3 _cartesian);
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float intensityNormalizer(float intensity, float iMin, float iMax);
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float3 CartesianToSpherical(float3 _cartesian) {
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// Put cartesian in [-1..1] range first
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_cartesian = (float3)(-1.0) + 2.0f* _cartesian;
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float r = length(_cartesian);
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float theta, phi;
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if (r == 0.0) {
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theta = phi = 0.0;
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} else {
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theta = acospi(_cartesian.z/r);
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phi = (M_PI + atan2(_cartesian.y, _cartesian.x)) / (2.0*M_PI);
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}
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r = r / native_sqrt(3.0f);
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// Sampler ignores w component
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return (float3)(r, theta, phi);
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}
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float intensityNormalizer(float intensity, float iMin, float iMax) {
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float i = clamp(intensity, iMin, iMax);
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i = (i - iMin) / (iMax - iMin);
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return clamp(i, 0.0f, 1.0f);
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}
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