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BentHorns.cpp
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BentHorns.cpp
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#include "BentHorns.h"
#include "Point.h"
#include <glm/gtc/constants.hpp>
#include <glm/vec3.hpp>
#include <glm/glm.hpp>
BentHorns::BentHorns(QOpenGLShaderProgram* prog, float radius, unsigned int nSlices, unsigned int nStacks, unsigned int sMax, unsigned int tMax) :
ParametricSurface(prog, nSlices, nStacks, sMax, tMax),
_radius(radius)
{
setAutoIncrName("Bent Horns");
buildMesh();
}
BentHorns::~BentHorns()
{
}
TriangleMesh* BentHorns::clone()
{
return new BentHorns(_prog, _radius, _slices, _stacks, _sMax, _tMax);
}
float BentHorns::firstUParameter() const
{
return -glm::pi<float>();
}
float BentHorns::lastUParameter() const
{
return glm::pi<float>();
}
float BentHorns::firstVParameter() const
{
return -glm::two_pi<float>();
}
float BentHorns::lastVParameter() const
{
return glm::two_pi<float>();
}
Point BentHorns::pointAtParameter(const float& u, const float& v)
{
Point P;
float x, y, z;
//http://paulbourke.net/geometry/toroidal/
// Bent Horns
// Where -pi <= u <= pi - 2pi <= v <= 2pi
x = _radius * (2.0f + cos(u)) * (v / 3.0f - sin(v));
y = _radius * (2.0f + cos(u - 2.0f * glm::pi<float>() / 3.0f)) * (cos(v) - 1.0f);
z = _radius * (2.0f + cos(u + 2.0f * glm::pi<float>() / 3.0f)) * (cos(v) - 1.0f) + _radius * 2.0f;
P.setParam(x, y, z);
return P;
}