baseshapes.cpp

file code.zip are used to implement ray tracing technology.

#include "BaseShapes.h"
#include <float.h>

void Cuboid::set(float l, float t, float r, float b, float f, float bk)
    { left = l; top = t; right = r; bott = b; front = f; back = bk;}

void Cuboid::set(Cuboid& c)
{
    left = c.left;top = c.top; right = c.right; bott = c.bott;
    front = c.front; back = c.back;
}

void Cuboid::print()
{
    cout << "\n(l,t,r,b,f,bk) = (" << left << "," << top << "," << right << ","
    << bott << "," << front << "," << back << ")";
}

void SphereInfo::set(float x, float y, float z, float rsq)
{
    center.set(x,y,z);
    radSq = rsq;
}

GeomObj::GeomObj() : next(NULL) { name = "N/A"; }
GeomObj::GeomObj(string NAME) : next(NULL) { name = NAME; }


Shape::Shape() {}

void Shape::setMaterial(Material mt) { mtrl = mt; }

void Shape::tellMaterialsGL()
{
    float amb[4], diff[4], spec[4], emiss[4];

    //Fill each array for use with openGL 'fv' functions
	mtrl.ambient.build4tuple(amb);
    mtrl.diffuse.build4tuple(diff);
    mtrl.specular.build4tuple(spec);
    mtrl.emissive.build4tuple(emiss);

    glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, amb);
    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, spec);
    glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, emiss);

	glMaterialf (GL_FRONT_AND_BACK, GL_SHININESS, mtrl.specularExponent);
}

void Shape::xfrmRay(Ray &genRay, Ray r)
{
    float v[4];

    r.getStart().build4tuple(v);
    invTransf.applyTransform(v);
    genRay.setStart(v[0], v[1], v[2]);

    r.getDir().build4tuple(v);
    invTransf.applyTransform(v);
    genRay.setDir(v[0], v[1], v[2]);

    return;
}