git-svn-id: https://reactphysics3d.googlecode.com/svn/trunk@218 92aac97c-a6ce-11dd-a772-7fcde58d38e6

sources/reactphysics3d/mathematics/Polygon3D.cpp

@@ -33,3 +33,24 @@ Polygon3D::Polygon3D(const std::vector<Vector3D>& vertexList)
 Polygon3D::~Polygon3D() {
 
 }
+
+// TODO : Delete this function if not needed
+// Return true if a point is in the same plane and inside the polygon
+// Hypothesis : The point has to be on the same plane as the polygon.
+/*
+bool Polygon3D::isPointInside(const Vector3D& point) const {
+    // TODO : Implement this method
+}
+*/
+
+// TODO : Delete this function if not needed
+// Return the intersection point between a segment and an egde of the polygon.
+// Hypothesis : The segment must be in the same plane as the polygon and it
+//              must intersection with at least one edge of the polygon.
+/*
+Vector3D Polygon3D::getEdgeIntersectionWithSegment(const Segment3D& segment) const {
+    // TODO : Implement this method
+}
+*/
+
+

sources/reactphysics3d/mathematics/Polygon3D.h

@@ -43,6 +43,9 @@ class Polygon3D {
 
         int getNbVertex() const;                                                     // Return the number of vertex of the polygon
         Vector3D getVertex(unsigned int index) const throw(std::invalid_argument);   // Return a vertex of the polygon
+        bool isPointInside(const Vector3D& point) const;                             // Return true if a point is in the same plane and inside the polygon
+        // TODO : Delete the following function if not needed
+        //Vector3D getEdgeIntersectionWithSegment(const Segment3D& segment) const;     // Return the intersection point between a segment and an egde of the polygon
 };
 
 // TODO : Test the Polygon3D class
@@ -64,7 +67,7 @@ inline Vector3D Polygon3D::getVertex(unsigned int index) const throw(std::invali
     }
 }
 
-} // End of the ReactPhysics3D
+} // End of the ReactPhysics3D namespace
 
 #endif
 

sources/reactphysics3d/mathematics/Segment3D.cpp

@@ -29,17 +29,11 @@ Segment3D::Segment3D() {
 }
 
 // Constructor with arguments
-Segment3D::Segment3D(Vector3D& pointA, Vector3D& pointB) {
+Segment3D::Segment3D(const Vector3D& pointA, const Vector3D& pointB) {
     this->pointA = pointA;
     this->pointB = pointB;
 }
 
-// Copy-constructor
-Segment3D::Segment3D(const Segment3D& segment)
-          :pointA(segment.pointA), pointB(segment.pointB) {
-
-}
-
 // Destructor
 Segment3D::~Segment3D() {
 

sources/reactphysics3d/mathematics/Segment3D.h

@@ -39,34 +39,51 @@ class Segment3D {
 
     public :
         Segment3D();                                                    // Constructor
-        Segment3D(Vector3D& pointA, Vector3D& pointB);      // Constructor with arguments
-        Segment3D(const Segment3D& segment);                // Copy-constructor
+        Segment3D(const Vector3D& pointA, const Vector3D& pointB);      // Constructor with arguments
         ~Segment3D();                                                   // Destructor
 
         Vector3D getPointA() const;                                     // Return the point A
         void setPointA(const Vector3D& pointA);                         // Set the point A
         Vector3D getPointB() const;                                     // Return the point B
         void setPointB(const Vector3D& pointB);                         // Set the point B
+        Vector3D getSegmentVector() const;                              // Return the vector between points A and B
+        double getLength() const;                                       // Return the length of the segment
 };
 
 // TODO : Test the Segment3D class
 
+// Return the point A
 inline Vector3D Segment3D::getPointA() const {
     return pointA;
 }
 
+// Set the point A
 inline void Segment3D::setPointA(const Vector3D& pointA) {
     this->pointA = pointA;
 }
 
+// Get the point B
 inline Vector3D Segment3D::getPointB() const {
     return pointB;
 }
 
+// Set the point B
 inline void Segment3D::setPointB(const Vector3D& pointB) {
     this->pointB = pointB;
 }
 
+// Return the vector between points A and B
+inline Vector3D Segment3D::getSegmentVector() const {
+    return (pointB - pointA);
+}
+
+// Return the length of the segment
+inline double Segment3D::getLength() const {
+    return (pointB - pointA).length();
+}
+
+
+
 } // End of the ReactPhysics3D namespace
 
 #endif

sources/reactphysics3d/mathematics/Vector3D.h

@@ -52,6 +52,7 @@ class Vector3D {
         void setAllValues(double x, double y, double z);        // Set all the values of the vector
         double length() const;                                  // Return the lenght of the vector
         Vector3D getUnit() const throw(MathematicsException);   // Return the corresponding unit vector
+        Vector3D getOpposite() const;                           // Return the vector in the opposite direction
         double scalarProduct(const Vector3D& vector) const;     // Scalar product of two vectors
         Vector3D crossProduct(const Vector3D& vector) const;    // Cross product of two vectors
 
@@ -107,6 +108,12 @@ inline double Vector3D::length() const {
     return sqrt(x*x + y*y + z*z);
 }
 
+// Return the vector in the opposite direction
+// TODO : Test this function
+inline Vector3D Vector3D::getOpposite() const {
+    return (Vector3D(0.0, 0.0, 0.0) - *this);
+}
+
 // Scalar product of two vectors (inline)
 inline double Vector3D::scalarProduct(const Vector3D& vector) const {
     // Compute and return the result of the scalar product

sources/reactphysics3d/mathematics/mathematics.h

@@ -33,6 +33,8 @@
 #include "constants.h"
 #include "exceptions.h"
 #include <cstdio>
+#include <cassert>
+#include <cmath>
 
 // ---------- Mathematics functions ---------- //
 
@@ -57,4 +59,81 @@ inline reactphysics3d::Vector3D rotateVectorWithQuaternion(const reactphysics3d:
     return quaternionResult.vectorV();
 }
 
+// TODO : Test this method
+// Move a set of points by a given vector.
+// The method returns a set of points moved by the given vector.
+inline std::vector<reactphysics3d::Vector3D> movePoints(const std::vector<reactphysics3d::Vector3D>& points, const reactphysics3d::Vector3D& vector) {
+    std::vector<reactphysics3d::Vector3D> result;
+
+    // For each point of the set
+    for (unsigned int i=0; i<points.size(); ++i) {
+        // Move the point
+        result.push_back(points.at(i) + vector);
+    }
+
+    // Return the result set of points
+    return result;
+}
+
+// TODO : Test this method
+// Return the intersection between two Segment3D that are on the same line. The result of the intersection
+// will be another Segment3D.
+inline reactphysics3d::Segment3D computeParallelSegmentsIntersection(const reactphysics3d::Segment3D& segment1, const reactphysics3d::Segment3D& segment2) {
+    // The two segments should be colinear
+    assert(equal(std::abs(segment1.getSegmentVector().scalarProduct(segment2.getSegmentVector())), segment1.getSegmentVector().length() * segment2.getSegmentVector().length()));
+
+    // Result segment
+    reactphysics3d::Segment3D resultSegment;
+
+    // Compute the vector of the line where both segments are
+    reactphysics3d::Vector3D lineVector = segment1.getSegmentVector();
+
+    // Compute the projection of the two points of the second segment on the line
+    double projSegment2PointA = lineVector.getUnit().scalarProduct(segment2.getPointA() - segment1.getPointA());
+    double projSegment2PointB = lineVector.getUnit().scalarProduct(segment2.getPointB() - segment1.getPointA());
+
+    std::cout << "Segment 2 - Proj A : " << projSegment2PointA << std::endl;
+    std::cout << "Segment 2 - Proj B : " << projSegment2PointB << std::endl;
+    std::cout << "Segment 1 - length : " << segment1.getLength() << std::endl;
+
+    // The projections intervals should intersect
+    assert(!(projSegment2PointA < 0.0 && projSegment2PointB < 0.0));
+    assert(!(projSegment2PointA > segment1.getLength() && projSegment2PointB > segment1.getLength()));
+
+    // Return the segment intersection according to the configuration of two projection intervals
+    if (projSegment2PointA >= 0 && projSegment2PointA <= segment1.getLength() && projSegment2PointB >= segment1.getLength()) {
+        resultSegment.setPointA(segment2.getPointA());
+        resultSegment.setPointB(segment1.getPointB());
+        return resultSegment;
+    }
+    else if (projSegment2PointA <= 0 && projSegment2PointB >= 0 && projSegment2PointB <= segment1.getLength()) {
+        resultSegment.setPointA(segment1.getPointA());
+        resultSegment.setPointB(segment2.getPointB());
+        return resultSegment;
+    }
+    else if (projSegment2PointA <= 0 && projSegment2PointB >= segment1.getLength()) {
+        return segment1;
+    }
+    else if (projSegment2PointA <= segment1.getLength() && projSegment2PointB <= segment1.getLength()) {
+        return segment2;
+    }
+
+    // We should never go here
+    assert(false);
+}
+
+// TODO : Delete this method if not needed
+// Return the intersection between a Segment3D and a Polygon3D that are on the same plane. The result of the intersection
+// will be another Segment3D.
+//inline reactphysics3d::Segment3D computeSegmentPolygonIntersection(const reactphysics3d::Segment3D& segment, const reactphysics3d::Polygon3D& polygon) {
+    // TODO : Implement this method
+//}
+
+// TODO : Delete this method if not needed
+// Return the intersection between two Polygon3D that are on the same plane. The result of the intersection
+// will be another Polygon3D.
+//inline reactphysics3d::Polygon3D computePolygonPolygonIntersection(const reactphysics3d::Polygon3D& polygon1, const reactphysics3d::Polygon3D& polygon2) {
+    // TODO : Implement this method
+//}
+
 #endif