/
Scene.cpp
285 lines (257 loc) · 8.82 KB
/
Scene.cpp
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#include "Raytracer.h"
#include "FreeImage.h"
#include <stdio.h>
#include <iostream>
#include <vector>
#include <fstream>
#include <string>
using namespace std;
float width = 700, height = 700;
Vector UL, UR, LL, LR;
Raytracer raytracer;
Triangle c1 = Triangle(Vector (0, 1, 3), Vector(0, 0, 3), Vector(1, 1, 3), Color(0, 0, 1));
Triangle c2 = Triangle(Vector(0, 0, 3), Vector (1, 0, 3), Vector(1, 1, 3), Color(0, 0, 1));
Triangle c3 = Triangle(Vector (0, 1, 2), Vector(0, 0, 2), Vector(1, 1, 2), Color(0, 1, 0));
Triangle c4 = Triangle(Vector(0, 0, 2), Vector (1, 0, 2), Vector(1, 1, 2), Color(0, 1, 0));
Triangle t1 = Triangle (Vector (0, 1, 3.3), Vector(1, 0, 3.3), Vector(-1, 0, 3.3), Color(0, 0, 1));
Triangle t2 = Triangle (Vector (0, 1.6, 3), Vector(1, 0.8, 3), Vector(-1, 0.8, 3), Color(0, 1, 0));
Triangle t3 = Triangle (Vector (0, 0.5, 2.8), Vector(1, -0.5, 2.8), Vector(-1, -0.5, 2.8), Color(1, 0, 0));
//Triangle triangles[3] = {t1, t2, t3};
Triangle triangles[1] = {t1};
Light light = Light(0.5, 0.5, 0.5, 0.5, 0.5, 0.5,false);
//std::vector <Triangle> triangles;
//triangles.push_back(t1);
struct Camera {
Vector eye;
Camera(Vector e = Vector(0,0,0)) {
eye = e;
}
};
class Image
{
private:
int C;
int R;
Color** pixels;
public:
Image(int numCols, int numRows) {
C = numCols;
R = numRows;
pixels = (Color**) malloc((R*sizeof(Color*)));
for(int i = 0; i < R; i++) {
pixels[i] = (Color*) malloc((C*sizeof(Color)));
for(int k = 0; k < C; k++) {
pixels[i][k] = Color(0, 0, 0);
}
}
}
bool setPixel(int column, int row, Color color) {
if(column >= 0 && column < C && row >= 0 && row < R) {
pixels[row][column] = color;
return true;
}
return false;
}
void flush() {
FreeImage_Initialise();
FIBITMAP* film = FreeImage_Allocate(R, C, 24);
RGBQUAD color;
for(int i = 0; i < R; i++) {
for(int k = 0; k < C; k++) {
color.rgbRed = pixels[i][k].r*255;
color.rgbGreen = pixels[i][k].g*255;
color.rgbBlue = pixels[i][k].b*255;
FreeImage_SetPixelColor(film, k, i-1, &color);
}
}
if(!FreeImage_Save(FIF_PNG, film, "output.png", 0)) {
printf("There was a problem!\n");
}
FreeImage_DeInitialise();
return;
}
};
bool intersect_search(Ray ray, Triangle* trig, int nTriangles, PoI* poi)
{
float min_hit = 99999;
int count = 0;
float t_hit;
for (count = 0; count < nTriangles; count ++)
{
Triangle t = trig[count];
//t.scale(2, 1, 1); //scale by x-axis by 2
bool hit = t.hit(ray, &t_hit);
if (hit && t_hit < min_hit)
{
min_hit = t_hit;
poi->setCollision(ray.getDir() * min_hit + ray.getPos());
poi->setColor(t.kd);
Vector myNorm = t.getNormal();
//if normal faces the wrong way, then needs to do soemthing about it
//cos(angle) = dot_product / (a.len * b.len)
float cosine = myNorm.Vdot(ray.getDir()) / (myNorm.getMag() * ray.getDir().getMag());
if (cosine < 0)
{
myNorm = myNorm * -1;
}
poi->setNormal(t.getNormal());
}
}
if (min_hit != 99999)
{
return true;
}
return false;
}
void readObj()
{
string line, temp;
float int1, int2, int3;
int tri1, tri2, tri3, nor;
std::vector< unsigned int > vertexIndices, uvIndices, normalIndices;
std::vector< Vector > temp_vertices;
std::vector< Triangle > temp_triangles;
std::vector< Vector > temp_normals;
ifstream myfile2 ("obj/triangle.obj");
//copied basics from http://stackoverflow.com/questions/4263837/what-is-the-content-of-obj-file
if (myfile2.is_open())
{
while (!myfile2.eof() )
{
getline (myfile2,line);
if (line[0] == 118 && line[1] == 32){
temp = line.substr(2,6);
int1 = atof(temp.c_str());
temp = line.substr(7,11);
int2 = atof(temp.c_str());
temp = line.substr(12,16);
int3 = atof(temp.c_str());
Vector myV = Vector(int1, int2, int3);
temp_vertices.push_back(myV);
}
else if (line[0] == 118 && line[1] == 110){
temp = line.substr(3,7);
int1 = atof(temp.c_str());
temp = line.substr(8,12);
int2 = atof(temp.c_str());
temp = line.substr(13,17);
int3 = atof(temp.c_str());
Vector myV = Vector(int1, int2, int3);
temp_normals.push_back(myV);
}
else if (line[0] == 102 && line[1] == 32){
temp = line.substr(2,4);
tri1 = atof(temp.c_str());
temp = line.substr(8,10);
tri2 = atof(temp.c_str());
temp = line.substr(14,16);
tri3 = atof(temp.c_str());
temp = line.substr(6,8);
nor = atof(temp.c_str());
Triangle myT = Triangle(temp_vertices[tri1], temp_vertices[tri2], temp_vertices[tri3]);
myT.setNormal(temp_normals[nor]);
temp_triangles.push_back(myT);
}
}
myfile2.close();
}
else cout << "Unable to open file";
}
int main(int argc, char** argv)
{
Color color;
float zpf = 0.5; //primitive is double, causes problems
float zpt = 0.25;
float zps = 0.75;
Camera cam = Camera();
raytracer = Raytracer(cam.eye, 16, Color(0,0,0), Color(0.1,0.1,0.1));
UL = Vector(-1, 1, 1);
UR = Vector( 1, 1, 1);
LR = Vector( 1, -1, 1);
LL = Vector(-1, -1, 1);
Image screen = Image(width, height);
//Triangle triangle(Vector(-9,-5,10),Vector(-3,-5,13),Vector(-6,5,10), Color(1,0.5,0.25));
//raytracer.registerShape(triangle);
//Sphere sphere = Sphere(Vector(0, 0, 10), 3, Color(0.5,0.5,0.5));
//raytracer.registerShape(sphere);
//Sphere sphere2 = Sphere(Vector(3, 0, 6), 1, Color(0.25,0.5,1));
//raytracer.registerShape(sphere2);
Triangle triangle = Triangle (Vector (-5, -5, 10), Vector(5, -5, 10), Vector(0, 5, 10));
raytracer.registerShape(triangle);
Light light = Light(0,0,0,1,0,1);
raytracer.registerLight(light);
for(float k = 0; k < height; k++) {
for(float i = 0; i < width; i++) {
float u = (i + zpf) / width;
float v = (k + zpf) / height;
Vector dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
Ray ray = Ray(cam.eye, dir);
PoI poi = PoI();
bool gotHit = intersect_search(ray, triangles, 1, &poi);
//PoI intersect = PoI(Vector(0,0,0), Vector(0,0,0));
//bool gotHit = triangle.hit(ray, &intersect);
//gotHit = gotHit || sphere.hit(ray, &intersect);
Color color1 = raytracer.trace(ray, 1);
u = (i + 2*zpt) / width;
v = (k + zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color2 = raytracer.trace(ray, 1);
u = (i + 3*zpt) / width;
v = (k + zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color3 = raytracer.trace(ray, 1);
u = (i + zpt) / width;
v = (k + 2*zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color4 = raytracer.trace(ray, 1);
u = (i + zpt) / width;
v = (k + 3*zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color5 = raytracer.trace(ray, 1);
u = (i + 2*zpt) / width;
v = (k + 2*zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color6 = raytracer.trace(ray, 1);
u = (i + 2*zpt) / width;
v = (k + 3*zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color7 = raytracer.trace(ray, 1);
u = (i + 3*zpt) / width;
v = (k + 2*zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color8 = raytracer.trace(ray, 1);
u = (i + 3*zpt) / width;
v = (k + 3*zpt) / height;
dir = ((UR.Vsca(v)).Vadd(UL.Vsca(1-v)).Vsca(u)).Vadd((LR.Vsca(v)).Vadd(LL.Vsca(1-v)).Vsca(1-u)).Vsub(cam.eye).Vnor();
ray = Ray(cam.eye, dir);
Color color9 = raytracer.trace(ray, 1);
/*if (gotHit)
{
color = poi.getColor();
//Ray shadow_ray. origin = poi.coliision, dir -> to light <<<<<<<<---- thingies for shadows
//bool isShadowed = intersect_search(shadow_ray, tra...)
//if(isShadowed)
// color = 0;
//else
//color = poi.shade(light);
}
else
{
color = Color(0, 0, 0);
}*/
//color = VtoC((CtoV(color1).Vadd(CtoV(color2)).Vadd(CtoV(color3)).Vadd(CtoV(color4)).Vadd(CtoV(color5)).Vadd(CtoV(color6)).Vadd(CtoV(color7)).Vadd(CtoV(color8)).Vadd(CtoV(color9))).Vdiv(9));
if(!screen.setPixel(k, i, color1)) {
printf("There was a problem!\n");
}
}
}
screen.flush();
return 0;
}