Main Page Namespace List Class Hierarchy Compound List File List Compound Members File Members
Main Page Namespace List Class Hierarchy Compound List File List Compound Members File Members #include <windows.h>#include "plane.h"#include "locmath.h"#include "mmgr.h"Go to the source code of this file.
Functions | |
| VECTOR | GetEdgeIntersection (VECTOR point0, VECTOR point1, PLANE plane, VECTOR pointOnPlane) |
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Definition at line 15 of file plane.cpp. References DotProduct(), PLANE::nx, PLANE::ny, PLANE::nz, VECTOR::x, VECTOR::y, and VECTOR::z.
00016 {
00017 VECTOR planeNormal, intersection, temp;
00018 float numerator, denominator, t;
00019
00020 // get the splitting planes normal
00021 planeNormal.x = plane.nx;
00022 planeNormal.y = plane.ny;
00023 planeNormal.z = plane.nz;
00024
00025 // find edge intersection:
00026 // intersection = p0 + (p1 - p0) * t
00027 // where t = (planeNormal . (pointOnPlane - p0)) / (planeNormal . (p1 - p0))
00028
00029 //planeNormal . (pointOnPlane - point0)
00030 temp.x = pointOnPlane.x - point0.x;
00031 temp.y = pointOnPlane.y - point0.y;
00032 temp.z = pointOnPlane.z - point0.z;
00033 numerator = DotProduct(planeNormal, temp);
00034
00035 //planeNormal . (point1 - point0)
00036 temp.x = point1.x - point0.x;
00037 temp.y = point1.y - point0.y;
00038 temp.z = point1.z - point0.z;
00039 denominator = DotProduct(planeNormal, temp);
00040
00041 if (denominator)
00042 t = numerator / denominator;
00043 else
00044 t = 0.0;
00045
00046 intersection.x = point0.x + temp.x * t;
00047 intersection.y = point0.y + temp.y * t;
00048 intersection.z = point0.z + temp.z * t;
00049
00050 return intersection;
00051 }
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1.2.15