sphere.cpp

Ray tracing on PS3, using the acceleration of PPU, No SPE acceleration is used. The code must be com

/* Copyright (c) 2007 Massachusetts Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
/**
 * sphere.cpp - Implementation for routines in the Sphere class
 * @author Brian Sweatt
 */

#include <stdio.h>
#include "sphere.h"
#include "common.h"

#ifndef __SPU__

Sphere ::  Sphere(const vector float &sphere, uint32_t materialID) :
  m_materialID(materialID) 
{
  m_x = vec_splat(sphere, 0);
  m_y = vec_splat(sphere, 1);
  m_z = vec_splat(sphere, 2);
  m_r = vec_splat(sphere, 3);
}

void Sphere::setPosition(vector float pos) {
  m_x = vec_splat(pos, 0);
  m_y = vec_splat(pos, 1);
  m_z = vec_splat(pos, 2);
}
  
void Sphere::translate(vector float dir) {
  m_x = vec_add(m_x, vec_splat(dir, 0));
  m_y = vec_add(m_y, vec_splat(dir, 1));
  m_z = vec_add(m_z, vec_splat(dir, 2));
}

#else

Sphere::Sphere(const vector float &sphere, uint32_t materialID) :
m_materialID(materialID)
{
  vector unsigned char splat0 = (vector unsigned char) {0,1,2,3,0,1,2,3,0,1,2,3,0,1,2,3};
  vector unsigned char splat1 = (vector unsigned char) {4,5,6,7,4,5,6,7,4,5,6,7,4,5,6,7};
  vector unsigned char splat2 = (vector unsigned char) {8,9,10,11,8,9,10,11,8,9,10,11,8,9,10,11};
  vector unsigned char splat3 = (vector unsigned char) {12,13,14,15,12,13,14,15,12,13,14,15,12,13,14,15};
  
  m_x = spu_shuffle(sphere, sphere, splat0);
  m_y = spu_shuffle(sphere, sphere, splat1);
  m_z = spu_shuffle(sphere, sphere, splat2);
  m_r = spu_shuffle(sphere, sphere, splat3);
}

void Sphere::setPosition(vector float pos) {
  vector unsigned char splat0 = (vector unsigned char) {0,1,2,3,0,1,2,3,0,1,2,3,0,1,2,3};
  vector unsigned char splat1 = (vector unsigned char) {4,5,6,7,4,5,6,7,4,5,6,7,4,5,6,7};
  vector unsigned char splat2 = (vector unsigned char) {8,9,10,11,8,9,10,11,8,9,10,11,8,9,10,11};
  vector unsigned char splat3 = (vector unsigned char) {12,13,14,15,12,13,14,15,12,13,14,15,12,13,14,15};
  
  m_x = spu_shuffle(pos, pos, splat0);
  m_y = spu_shuffle(pos, pos, splat1);
  m_z = spu_shuffle(pos, pos, splat2);
}

void Sphere::translate(vector float dir) {
  vector unsigned char splat0 = (vector unsigned char) {0,1,2,3,0,1,2,3,0,1,2,3,0,1,2,3};
  vector unsigned char splat1 = (vector unsigned char) {4,5,6,7,4,5,6,7,4,5,6,7,4,5,6,7};
  vector unsigned char splat2 = (vector unsigned char) {8,9,10,11,8,9,10,11,8,9,10,11,8,9,10,11};
  vector unsigned char splat3 = (vector unsigned char) {12,13,14,15,12,13,14,15,12,13,14,15,12,13,14,15};
  
  m_x = spu_add(m_x, spu_shuffle(dir, dir, splat0));
  m_y = spu_add(m_y, spu_shuffle(dir, dir, splat1));
  m_z = spu_add(m_z, spu_shuffle(dir, dir, splat2));
}

vector float Sphere::getBoundingBoxMin() {
  vector float center = (vector float) {spu_extract(m_x,0), \
					spu_extract(m_y,0), \
					spu_extract(m_z,0), \
					0.0f}; 
  return spu_sub(center, m_r); 
}

vector float Sphere::getBoundingBoxMax() {
  vector float center = (vector float) {spu_extract(m_x,0), \
					spu_extract(m_y,0), \
					spu_extract(m_z,0), \
					0.0f}; 
  return spu_add(center, m_r); 

}

#endif