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54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
#include "Pch.h"
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#include "MeshMisc.h"
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namespace Flower
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{
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void StaticMeshRenderBounds::toExtents(
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const StaticMeshRenderBounds& in,
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float& zmin,
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float& zmax,
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float& ymin,
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float& ymax,
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float& xmin,
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float& xmax,
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float scale)
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{
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xmax = in.origin.x + in.extents.x * scale;
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xmin = in.origin.x - in.extents.x * scale;
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ymax = in.origin.y + in.extents.y * scale;
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ymin = in.origin.y - in.extents.y * scale;
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zmax = in.origin.z + in.extents.z * scale;
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zmin = in.origin.z - in.extents.z * scale;
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}
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StaticMeshRenderBounds StaticMeshRenderBounds::combine(
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const StaticMeshRenderBounds& b0,
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const StaticMeshRenderBounds& b1)
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{
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float zmin0, zmin1, zmax0, zmax1, ymin0, ymin1, ymax0, ymax1, xmin0, xmin1, xmax0, xmax1;
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toExtents(b0, zmin0, zmax0, ymin0, ymax0, xmin0, xmax0);
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toExtents(b1, zmin1, zmax1, ymin1, ymax1, xmin1, xmax1);
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float xmax = std::max(xmax0, xmax1);
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float ymax = std::max(ymax0, ymax1);
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float zmax = std::max(zmax0, zmax1);
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float xmin = std::min(xmin0, xmin1);
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float ymin = std::min(ymin0, ymin1);
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float zmin = std::min(zmin0, zmin1);
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StaticMeshRenderBounds ret{};
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ret.origin.x = (xmax + xmin) * 0.5f;
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ret.origin.y = (ymax + ymin) * 0.5f;
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ret.origin.z = (zmax + zmin) * 0.5f;
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ret.extents.x = (xmax - xmin) * 0.5f;
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ret.extents.y = (ymax - ymin) * 0.5f;
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ret.extents.z = (zmax - zmin) * 0.5f;
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ret.radius = std::sqrt(ret.extents.x * ret.extents.x + ret.extents.y * ret.extents.y + ret.extents.z * ret.extents.z);
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return ret;
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}
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} |