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voxel-raycaster
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Mitchell Hansen 8 years ago
parent 45343a2e97
commit 624d2771ac
6 changed files with 714 additions and 26 deletions
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533
build/CMakeFiles/3.5.2/CompilerIdCXX/CMakeCXXCompilerId.cpp
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include/Ray.h
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#pragma once
#include <SFML/Graphics.hpp>
#include <iostream>
#include "Map.h"
class Ray {
private:
// The Tail of the vector
sf::Vector3<float> origin
// Direction / Length of the vector
sf::Vector3<float> direction;
// The incrementing points at which T intersects int(X, Y, Z) points
sf::Vector3<float> intersction_t;
// The speed at which the ray climbs.
// Take the slope of the line (1 / cartesian.x/y/z) = delta_t.x/y/z
sf::Vector3<float> delta_t;
// The 3d voxel position the ray is currently at
sf::Vector3<int> voxel;
// Reference to the voxel map
Map *m;
// The dimensions of the voxel map
sf::Vector3<int> dimensions;
public:
public Ray(
Map *m,
sf::Vector2<int> resolution,
sf::Vector2<int> pixel,
sf::Vector3<float> camera_position,
sf::Vector3<float> ray_direction
);
public sf::Color Cast();
}

31
include/util.hpp
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#pragma once
#include <SFML/Graphics.hpp>
struct fps_counter {
public:
fps_counter(){
if(!f.loadFromFile("../assets/fonts/Arial.ttf")){
std::cout << "couldn't find the fallback Arial font "
"in ../assets/fonts/" << std::endl;
} else {
t.setFont(f);
}
}
void frame(double delta_time){
frame_count++;
fps_average += (delta_time - fps_average) / frame_count;
}
void draw(sf::RenderWindow *r){
t.setString(std::to_string(fps_average));
r->draw(t);
}
private:
sf::Font f;
sf::Text t;
int frame_count = 0;
double fps_average = 0;
};

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src/Map.cpp
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#pragma once
#include <iostream>

104
src/Ray.cpp
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#pragma once
#include <SFML/Graphics.hpp>
#include <iostream>
#include "Map.h"
Ray::Ray(
Map *m,
sf::Vector2<int> resolution,
sf::Vector2<int> pixel,
sf::Vector3<float> camera_position,
sf::Vector3<float> ray_direction){
this.m = m;
origin = camera_position;
direction = ray_direction;
dimensions = m->getDimensions();
}
sf::Color Ray::Cast(){
// Get the cartesian direction for computing slope
sf::Vector3<float> cartesian = direction.toCartesian();
// Compute the slopes
delta_t = sf::Vector3<float>(
(float)(1.0 / cartesian.x),
(float)(1.0 / cartesian.y),
(float)(1.0 / cartesian.z)
);
// Set the first intersection to be offset by the VOXEL camera position
intersection_t = sf::Vector3<float>(
delta_t.x + (int)origin.x,
delta_t.y + (int)origin.y,
delta_t.z + (int)origin.z
);
// Setup the voxel coords from the camera origin
voxel = sf::Vector3<float>(
(int)origin.x,
(int)origin.y,
(int)origin.z
);
// Setup the voxel step based on what direction the ray is pointing
sf::Vector3<int> voxel_step(1, 1, 1);
if (direction.x <= 0f || direction.x >= 3.14f) {
voxel_step.x *= -1;
}
if (directoin.y <= 0f || direction.y >= 3.14f) {
voxel_step.y *= -1;
}
if (direction.z <= 0f || direction.z >= 3.14f) {
voxel_step.z *= -1;
}
int dist = 0;
do {
if(intersection_t.x < intersection_t.y) {
if(intersection_t.x < intersection_t.z) {
voxel.x = voxel.x + voxel_step.x;
intersection_t.x = intersection_t.x + delta_t.x;
} else {
voxel.z = voxel.z + voxel_step.z;
intersection_t.z= intersection_t.z + delta_t.z;
}
} else {
if(intersection_t.y < intersection_t.z) {
voxel.y = voxel.y + voxel_step.y;
intersection_t.y = intersection_t.y + delta_t.y;
} else {
voxel.z = voxel.z + voxel_step.z;
intersection_t.z = intersection_t.z + delta_t.z;
}
}
// If the voxel went out of bounds
if (voxel.x > 49 || voxel.y > 49){
return sf::Color::Blue;;
}
else if (voxel.z > 49 || voxel.x < 0 || voxel.y < 0 || voxel.z < 0){
return sf::Color:Green;
}
// If we found a voxel
// Registers hit on non-zero
else if (map.list[voxel.x, voxel.y, voxel.z] != 0){
//TODO: Switch that assigns color on voxel data
return sf::Color:Red;
}
else {
dist++;
}
} while(dist < 200);
return sf::Color::Grey;
}
}

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src/main.cpp
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#include <iostream>
#include <string>
#include <chrono>
#include "util.hpp"
const int WINDOW_X = 600;
const int WINDOW_Y = 800;
struct fps_counter {
public:
fps_counter(){
if(!f.loadFromFile("../assets/fonts/Arial.ttf")){
std::cout << "couldn't find the fallback Arial font "
"in ../assets/fonts/" << std::endl;
} else {
t.setFont(f);
}
}
void frame(double delta_time){
frame_count++;
fps_average += (delta_time - fps_average) / frame_count;
}
void draw(sf::RenderWindow *r){
t.setString(std::to_string(fps_average));
r->draw(t);
}
private:
sf::Font f;
sf::Text t;
int frame_count = 0;
double fps_average = 0;
};
float elap_time(){
static std::chrono::time_point<std::chrono::system_clock> start;
static bool started = false;

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