initial import from /gvsu/cs658 repository

git-svn-id: svn://anubis/fart/trunk@2 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Makefile

@@ -0,0 +1,20 @@
+
+OBJS := $(patsubst %.cc,%.o,$(wildcard *.cc))
+
+all: $(OBJS)
+
+%.o: %.cc
+	$(CXX) -c -o $@ $(CPPFLAGS) $(CXXFLAGS) $<
+
+# Make dependency files
+%.dep: %.cc
+	@set -e; rm -f $@; \
+	  $(CXX) -MM $(CPPFLAGS) $< > $@.$$$$; \
+	  sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \
+	  rm -f $@.$$$$
+
+clean:
+	-$(RM) -f *.o *.dep $(ARCHIVE)
+
+# Include dependency files
+include $(OBJS:.o=.dep)

util/Ray.cc

@@ -0,0 +1,26 @@
+
+#include "Ray.h"
+
+Ray::Ray()
+{
+}
+
+Ray::Ray(const Vector & origin, const Vector & direction)
+{
+    m_origin = origin;
+    m_direction = direction;
+    m_direction.normalize();
+}
+
+/*
+ * return a vector for the point at distance dist
+ * from the ray's origin point, along its direction.
+ */
+Vector Ray::getPositionAt(double dist) const
+{
+    Vector v;
+    v[0] = m_origin[0] + dist * m_direction[0];
+    v[1] = m_origin[1] + dist * m_direction[1];
+    v[2] = m_origin[2] + dist * m_direction[2];
+    return v;
+}

util/Ray.h

@@ -0,0 +1,22 @@
+
+#ifndef RAY_H
+#define RAY_H RAY_H
+
+#include "Vector.h"
+
+class Ray
+{
+    public:
+        Ray();
+        Ray(const Vector & origin, const Vector & direction);
+        const Vector & getOrigin() const { return m_origin; }
+        const Vector & getDirection() const { return m_direction; }
+        Vector getPositionAt(double dist) const;
+
+    private:
+        Vector  m_origin;
+        Vector  m_direction;
+};
+
+#endif
+

util/Solver.cc

@@ -0,0 +1,77 @@
+
+#include "Solver.h"
+#include <math.h>
+
+/* Generic Solver constructor */
+Solver::Solver(double a, double b, double c, double d, double e)
+{
+    this->a = a;
+    this->b = b;
+    this->c = c;
+    this->d = d;
+    this->e = e;
+}
+
+
+/**************************************************************************
+ * QuadraticSolver methods                                                *
+ *************************************************************************/
+QuadraticSolver::QuadraticSolver(double a, double b, double c)
+    : Solver(a, b, c)
+{
+}
+
+/* solve a quadratic equation */
+Solver::Result QuadraticSolver::solve()
+{
+    Result res;
+    double discriminant = b * b - 4 * a * c;
+    if (discriminant < 0.0)
+    {
+        res.numResults = 0;
+    }
+    else
+    {
+        double sqrt_discriminant = sqrt(discriminant);
+        double two_a = 2.0 * a;
+        if (sqrt_discriminant = 0.0)
+        {
+            res.numResults = 1;
+            res.results[0] = (-b) / two_a;
+        }
+        else
+        {
+            res.numResults = 2;
+            res.results[0] = (-b - sqrt_discriminant) / two_a;
+            res.results[1] = (-b + sqrt_discriminant) / two_a;
+        }
+    }
+
+    return res;
+}
+
+
+/**************************************************************************
+ * CubicSolver methods                                                    *
+ *************************************************************************/
+CubicSolver::CubicSolver(double a, double b, double c, double d)
+    : Solver(a, b, c, d)
+{
+}
+
+Solver::Result CubicSolver::solve()
+{
+}
+
+
+/**************************************************************************
+ * QuarticSolver methods                                                  *
+ *************************************************************************/
+QuarticSolver::QuarticSolver(double a, double b, double c, double d, double e)
+    : Solver(a, b, c, d, e)
+{
+}
+
+Solver::Result QuarticSolver::solve()
+{
+}

util/Solver.h

@@ -0,0 +1,47 @@
+
+#ifndef SOLVER_H
+#define SOLVER_H SOLVER_H
+
+class Solver
+{
+    public:
+        typedef struct
+        {
+            int     numResults;
+            double  results[4];
+        } Result;
+
+        Solver(double a = 0.0,
+               double b = 0.0,
+               double c = 0.0,
+               double d = 0.0,
+               double e = 0.0);
+        virtual Result solve() = 0;
+
+    protected:
+        double a, b, c, d, e;
+};
+
+class QuadraticSolver : public Solver
+{
+    public:
+        QuadraticSolver(double a, double b, double c);
+        Result solve();
+};
+
+class CubicSolver : public Solver
+{
+    public:
+        CubicSolver(double a, double b, double c, double d);
+        Result solve();
+};
+
+class QuarticSolver : public Solver
+{
+    public:
+        QuarticSolver(double a, double b, double c, double d, double e);
+        Result solve();
+};
+
+#endif
+

util/Vector.cc

@@ -0,0 +1,43 @@
+
+#include "Vector.h"
+#include <iostream>
+#include <math.h>
+
+Vector::Vector()
+{
+    m_array[0] = 0.0;
+    m_array[1] = 0.0;
+    m_array[2] = 0.0;
+}
+
+void Vector::normalize()
+{
+    double length = sqrt(m_array[0] * m_array[0]
+                       + m_array[1] * m_array[1]
+                       + m_array[2] * m_array[2]);
+    m_array[0] /= length;
+    m_array[1] /= length;
+    m_array[2] /= length;
+}
+
+std::ostream & operator<<(std::ostream & out, const Vector & v)
+{
+    out << "[" << v[0] << ", " << v[1] << ", " << v[2] << "]";
+    return out;
+}
+
+/* Compute the dot-product of two vectors */
+double operator%(const Vector & v1, const Vector & v2)
+{
+    return v1[0] * v2[0] + v1[1] * v2[1] + v1[2] * v2[2];
+}
+
+/* Compute the cross-product of two vectors */
+Vector operator*(const Vector & v1, const Vector & v2)
+{
+    Vector result;
+    result[0] = v1[1] * v2[2] - v1[2] * v2[1];
+    result[1] = v1[2] * v2[0] - v1[0] * v2[2];
+    result[2] = v1[0] * v2[1] - v1[1] * v2[0];
+    return result;
+}

util/Vector.h

@@ -0,0 +1,24 @@
+
+#ifndef VECTOR_H
+#define VECTOR_H VECTOR_H
+
+#include <iostream>
+
+class Vector
+{
+    public:
+        Vector();
+        ~Vector();
+        double & operator[](int idx) { return m_array[idx]; }
+        double operator[](int idx) const { return m_array[idx]; }
+        void normalize();
+
+    private:
+        double  m_array[3];
+};
+
+std::ostream & operator<<(std::ostream & out, const Vector & v);
+double operator%(const Vector & v1, const Vector & v2);
+Vector operator*(const Vector & v1, const Vector & v2);
+
+#endif