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Author SHA1 Message Date
Amy Retzerau
85dbded287 cpp end 2026-04-03 12:34:06 +02:00
Amy Retzerau
cd77088dbf setuo: clang cache to gitignore 2026-04-03 12:33:45 +02:00
20 changed files with 2272 additions and 0 deletions
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#include "fastmath.hpp"
#include "polygon.hpp"
#include <QApplication>
#include <QImage>
#include <QLabel>
#include <QPixmap>
#include <iostream>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
// testing fastmath.h
/*
void test(vec<2> *in) {
vec<2> v = {{decimal(1.0), decimal(0.5)}};
in = &v;
}*/
int main(int argc, char *argv[]) {
vec3 v1 = vec3(5.0f, 40.0f, 2.0f);
vec3 v2 = vec3(5.0, 10.0, 2.2);
vec3 v3 = v1;
std::cout << v1 << v2 << decimal(0.5) * v2 << (v1 + v2) << v1 * v2 << "\n"
<< v1.cross(v2) << v1.len() << "\n"
<< v1.normalize() << std::endl;
decimal d = decimal(2.0f);
d += decimal(0.5);
std::cout << "\n"
<< decimal(2.0) / decimal(-0.5) << "\n"
<< decimal(2.0).sqrt() << "\n"
<< d << std::endl;
polygon p = {vec3(0.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0), vec3(1.0, 0.0, 0.0)};
std::cout << p.contains(vec3(0.1, 0.1, 0.1)) << std::endl;
std::cout << matN<3>::identity() * v1 << std::endl;
// QApplication a(argc, argv);
//
// uint8_t *pixel = new uint8_t[64 * 64 * 3];
//
// for (int i = 1; i < 64 * 64 * 3; i += 3) {
// pixel[i] = 255;
// }
//
// QWidget widget;
// widget.setAutoFillBackground(true);
// widget.setGeometry(0, 0, 500, 500);
// QLabel display(&widget);
// QImage img((unsigned char *)pixel, 64, 64, QImage::Format_RGB888);
// display.setPixmap(QPixmap::fromImage(img).scaled(widget.size()));
// widget.show();
// return a.exec();
}

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MainWindow.hpp Normal file
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#include <QImage>
#include <QKeyEvent>
#include <QLabel>
#include <QObject>
#include <QPixmap>
#include <QTimer>
#include <QWidget>
#include <iostream>
class MainWindow : public QWidget {
public:
std::function<void(QKeyEvent *)> keyDownCallBack;
MainWindow() : display(QLabel(this)) {
setAutoFillBackground(true);
setGeometry(0, 0, 500, 500);
display.setFocusPolicy(Qt::StrongFocus);
}
void updateLabel(uint8_t *pixel) {
QImage img((unsigned char *)pixel, 64, 64, QImage::Format_RGB888);
display.setPixmap(QPixmap::fromImage(img).scaled(size() * 1));
}
void keyPressEvent(QKeyEvent *e) {
keyDownCallBack(e);
QWidget::keyPressEvent(e);
}
private:
QLabel display;
};

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beziercurve.hpp Normal file
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#include "fastmath.hpp"
template <class T>
T calcHandels(const T curr, const T prev, const T next, T &left, T &right) {
T prev
}
template <class T> T bezierCurve(T a, T ad, T b, T bd, float t) {
return std::pow(1 - t, 3.0) * a + 3 * std::pow(1 - t, 2.0) * t * ad +
3 * (1 - t) * std::pow(t, 2.0) * bd + std::pow(t, 3.0) * b;
}

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fastmath.hpp Normal file
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#ifndef FASTMATH_H
#define FASTMATH_H
#include <iostream>
#include <math.h>
#include <stdint.h>
#include <stdlib.h>
#include <vector>
#define SHIFT_AMOUNT 16
#define HALF_SHIFT (SHIFT_AMOUNT / 2)
#define SHIFT_MASK ((1 << SHIFT_AMOUNT) - 1)
#define TO_FLOAT(x) \
(((float)(x >> SHIFT_AMOUNT)) + \
((double)(x & SHIFT_MASK) / (1 << SHIFT_AMOUNT)))
#define TO_INT(x) ((int32_t)(x * (1 << SHIFT_AMOUNT)))
#define MUL_F(a, b) (((a) >> HALF_SHIFT) * ((b) >> HALF_SHIFT))
#define DIV_F(a, b) ((((a) << HALF_SHIFT) / (b)) << HALF_SHIFT)
struct decimal {
int32_t i;
constexpr decimal() = default;
// constexpr decimal() : i(0) {}
constexpr decimal(float i) : i(TO_INT(i)) {}
constexpr decimal(double i) : i(TO_INT(i)) {}
constexpr decimal(int32_t i) : i(i) {}
inline friend std::ostream &operator<<(std::ostream &os, const decimal &d) {
return (os << TO_FLOAT(d.i));
}
inline friend decimal operator+(const decimal &d1, const decimal &d2) {
return {d1.i + d2.i};
}
inline decimal &operator+=(const decimal &d) { return (*this) = {i + d.i}; }
inline decimal &operator-=(const decimal &d) { return (*this) = {i - d.i}; }
inline friend decimal operator-(const decimal &d1, const decimal &d2) {
return {d1.i - d2.i};
}
inline friend decimal operator-(const decimal &d) { return {-d.i}; }
inline friend decimal operator*(const decimal &d1, const decimal &d2) {
return {MUL_F(d1.i, d2.i)};
}
inline decimal &operator*=(const decimal &d) {
return (*this) = {MUL_F(i, d.i)};
}
inline friend decimal operator/(const decimal &d1, const decimal &d2) {
return {DIV_F(d1.i, d2.i)};
}
inline friend bool operator<(const decimal &d1, const decimal &d2) {
return d1.i < d2.i;
}
inline friend bool operator>(const decimal &d1, const decimal &d2) {
return d1.i > d2.i;
}
inline friend bool operator<=(const decimal &d1, const decimal &d2) {
return d1.i <= d2.i;
}
inline friend bool operator>=(const decimal &d1, const decimal &d2) {
return d1.i >= d2.i;
}
inline friend bool operator==(const decimal &d1, const decimal &d2) {
return d1.i == d2.i;
}
inline friend bool operator!=(const decimal &d1, const decimal &d2) {
return d1.i != d2.i;
}
inline decimal sqrt() { return {((int32_t)sqrtf(i)) << HALF_SHIFT}; }
inline float to_float() { return TO_FLOAT(i); }
inline bool isSmall() { return (abs(i) < (1 << (HALF_SHIFT - 1))); }
};
template <int n, class Dev> struct vec {
decimal v[n];
constexpr vec() noexcept = default;
template <class... Args>
constexpr vec(Args... args) noexcept : v{static_cast<decimal>(args)...} {
static_assert(sizeof...(Args) == n, "Wrong number of elements for vec");
}
friend Dev operator+(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = v1.v[i] + v2.v[i];
}
return newV;
}
friend Dev operator+=(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = v1.v[i] + v2.v[i];
}
return newV;
}
friend Dev operator-=(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = v1.v[i] - v2.v[i];
}
return newV;
}
friend Dev operator-(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = v1.v[i] - v2.v[i];
}
return newV;
}
friend std::ostream &operator<<(std::ostream &os, const vec<n, Dev> &v) {
os << "(" << v.v[0];
for (int i = 1; i < n; i++) {
os << ", " << v.v[i];
}
return (os << ")" << std::endl);
}
Dev operator-() {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = -v[i];
}
return newV;
}
friend Dev operator*(const vec<n, Dev> &v, const decimal &d) {
int32_t f = d.i >> HALF_SHIFT;
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = (v.v[i].i >> HALF_SHIFT) * f;
}
return newV;
}
static Dev max(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = std::max(v1.v[i], v2.v[i]);
}
return newV;
}
static Dev min(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
Dev newV;
for (int i = 0; i < n; i++) {
newV.v[i] = std::min(v1.v[i], v2.v[i]);
}
return newV;
}
friend Dev operator*(const decimal &d, const vec<n, Dev> &v) {
return v * d;
}
friend decimal operator*(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
decimal res = decimal(0.0f);
for (int i = 0; i < n; i++) {
res += v1.v[i] * v2.v[i];
}
return res;
}
friend bool operator==(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
bool res = true;
for (int i = 0; i < n; i++) {
res &= v1.v[i] == v2.v[i];
}
return res;
}
bool isSmall() {
for (int i = 0; i < n; i++) {
if (!v[i].isSmall())
return false;
}
return true;
}
decimal &operator[](const int &i) { return v[i]; }
decimal len_sq() { return *this * *this; }
decimal len() { return this->len_sq().sqrt(); }
Dev normalize() {
decimal f = decimal(1.0) / this->len();
return (*this * f);
}
constexpr static Dev zero() {
Dev newV;
for (int i = 0; i < n; i++) {
newV[i] = decimal(0);
}
return newV;
}
};
struct vec2 : public vec<2, vec2> {
vec2() : vec<2, vec2>() {};
vec2(float x, float y) : vec<2, vec2>(decimal(x), decimal(y)) {}
vec2(double x, double y) : vec<2, vec2>(decimal(x), decimal(y)) {}
vec2(int32_t x, int32_t y) : vec<2, vec2>(decimal(x), decimal(y)) {}
vec2(decimal x, decimal y) : vec<2, vec2>(x, y) {}
template <class origVec> vec2(origVec v) : vec<2, vec2>(v.v[0], v.v[1]) {}
decimal &x() { return v[0]; }
decimal &y() { return v[1]; }
};
struct vec3 : public vec<3, vec3> {
constexpr vec3() : vec<3, vec3>() {}
constexpr vec3(float x, float y, float z)
: vec<3, vec3>(decimal(x), decimal(y), decimal(z)) {}
constexpr vec3(double x, double y, double z)
: vec<3, vec3>(decimal(x), decimal(y), decimal(z)) {}
constexpr vec3(int32_t x, int32_t y, int32_t z)
: vec<3, vec3>(decimal(x), decimal(y), decimal(z)) {}
constexpr vec3(decimal x, decimal y, decimal z) : vec<3, vec3>(x, y, z) {}
inline decimal &x() { return v[0]; }
inline decimal &y() { return v[1]; }
inline decimal &z() { return v[2]; }
inline vec3 cross(vec3 &v) {
return vec3((y() * v.z()) - (z() * v.y()),
(z() * v.x()) - (x() * v.z()),
(x() * v.y()) - (y() * v.x()));
}
};
struct vec4 : public vec<4, vec4> {
constexpr vec4() : vec<4, vec4>() {}
vec4(float x, float y, float z, float w)
: vec<4, vec4>(decimal(x), decimal(y), decimal(z), decimal(w)) {}
vec4(double x, double y, double z, double w)
: vec<4, vec4>(decimal(x), decimal(y), decimal(z), decimal(w)) {}
vec4(int32_t x, int32_t y, int32_t z, int32_t w)
: vec<4, vec4>(decimal(x), decimal(y), decimal(z), decimal(w)) {}
vec4(vec3 v, decimal w) : vec<4, vec4>(v.x(), v.y(), v.z(), w) {}
decimal &x() { return v[0]; }
decimal &y() { return v[1]; }
decimal &z() { return v[2]; }
decimal &w() { return v[3]; }
};
template <int n, class Dev> struct mat {
decimal m[n * n];
static const int size = n;
friend Dev operator+(const mat<n, Dev> &m1, const mat<n, Dev> &m2) {
Dev newM = {};
for (int i = 0; i < n * n; i++) {
newM.v[i] = m1.m[i] + m2.m[i];
}
return newM;
}
friend Dev operator+=(const mat<n, Dev> &m1, const mat<n, Dev> &m2) {
Dev newM = {};
for (int i = 0; i < n * n; i++) {
newM.m[i] = m1.m[i] + m2.m[i];
}
return newM;
}
friend Dev operator-(const mat<n, Dev> &m1, const mat<n, Dev> &m2) {
Dev newM = {};
for (int i = 0; i < n * n; i++) {
newM.m[i] = m1.m[i] - m2.m[i];
}
return newM;
}
friend std::ostream &operator<<(std::ostream &os, const mat<n, Dev> &m) {
for (int i = 0; i < n; i++) {
os << "|" << m.m[i * n];
for (int j = 1; j < n; j++) {
os << ", " << m.m[i * n + j];
}
os << "|" << "\n";
}
return (os << std::endl);
}
template <class Dev1>
friend Dev1 operator*(const mat<n, Dev> &mat, const vec<n, Dev1> &v) {
Dev1 newV = vec<n, Dev1>::zero();
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
newV[i] += mat.m[i * n + j] * v.v[j];
}
}
return newV;
}
decimal &operator[](const int &i) { return m[i]; }
friend Dev operator*(const mat<n, Dev> &m1, const mat<n, Dev> &m2) {
Dev newM = mat<n, Dev>::zero();
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
for (int k = 0; k < n; k++) {
newM[i * n + j] += m1.m[i * n + k] * m2.m[k * n + j];
}
}
}
return newM;
}
constexpr static Dev identity() {
Dev newM = {};
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (i == j)
newM.m[i * n + i] = decimal(1.0f);
else
newM.m[i * n + j] = decimal(0.0f);
}
}
return newM;
}
constexpr static Dev zero() {
Dev newM = {};
for (int i = 0; i < n * n; i++) {
newM[i] = decimal(0);
}
return newM;
}
inline void set(int x, int y, decimal v) { m[y * n + x] = v; }
inline decimal get(int x, int y) { return m[y * n + x]; }
friend bool operator==(const mat<n, Dev> &m1, const mat<n, Dev> &m2) {
bool res = true;
for (int i = 0; i < n * n; i++) {
res &= m1.m[i] == m2.m[i];
}
return res;
}
bool isSmall() {
for (int i = 0; i < n; i++) {
if (!m[i].isSmall())
return false;
}
return true;
}
template <class Dev1> Dev1 cutTo() const {
static_assert(Dev1::size < n, "Can only convert to smaller matrix");
Dev1 newM = mat<Dev1::size, Dev1>::zero();
for (int i = 0; i < Dev1::size; i++) {
for (int j = 0; j < Dev1::size; j++) {
newM.m[Dev1::size * i + j] = m[n * i + j];
}
}
return newM;
}
};
template <int n> struct matN : public mat<n, matN<n>> {};
struct mat3 : public mat<3, mat3> {};
struct mat4 : public mat<4, mat4> {
static mat4 translation(const vec3 &v) {
mat4 newM = mat4::identity();
for (int i = 0; i < 3; i++) {
newM[4 * i + 3] = v.v[i];
}
return newM;
}
static mat4 rotateOnX(float a) {
mat4 newM = mat4::identity();
newM.m[1 * 4 + 1] = cos(a), newM.m[2 * 4 + 2] = cos(a);
newM.m[1 * 4 + 2] = -sin(a), newM.m[2 * 4 + 1] = sin(a);
return newM;
}
static mat4 rotateOnY(float a) {
mat4 newM = mat4::identity();
newM.m[0 * 4 + 0] = cos(a), newM.m[2 * 4 + 2] = cos(a);
newM.m[0 * 4 + 2] = sin(a), newM.m[2 * 4 + 0] = -sin(a);
return newM;
}
static mat4 rotateOnZ(float a) {
mat4 newM = mat4::identity();
newM.m[0 * 4 + 0] = cos(a), newM.m[1 * 4 + 1] = cos(a);
newM.m[1 * 4 + 0] = sin(a), newM.m[0 * 4 + 1] = -sin(a);
return newM;
}
};
#endif

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#include "MainWindow.hpp"
#include "fastmath.hpp"
#include "plane.hpp"
#include "polygon.hpp"
#include "renderer.hpp"
#include "rendertarget.hpp"
#include "testModel.hpp"
#include <QApplication>
#include <chrono>
#include <functional>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define HIGHT 64
#define WIDTH 64
#define FAA_FAC 2
#define RHIGHT ((int)(HIGHT * FAA_FAC))
#define RWIDTH ((int)(WIDTH * FAA_FAC))
char *drawToString(unsigned short *img) {
char *textImg = (char *)malloc(200000 * sizeof(char));
// strcat(textImg,"\e[1;1H\e[2J"); --clear
for (int y = 0; y < HIGHT; y++) {
for (int x = 0; x < WIDTH; x++) {
// printf("%d,%d\n",x,y);
char buff[20];
unsigned short val = 0;
int my = y * FAA_FAC;
int mx = x * FAA_FAC;
val += img[my * RWIDTH + mx];
val += img[my * RWIDTH + mx + 1];
val += img[(my + 1) * RWIDTH + mx];
val += img[(my + 1) * RWIDTH + mx + 1];
sprintf(buff, "\033[38;5;%dm██\033[0m", 232 + val / 4);
strcat(textImg, buff);
}
strcat(textImg, "\n");
}
return textImg;
}
int main(int argc, char *argv[]) {
Rendertarget target(128, 128);
Renderer renderer;
renderer.target = &target;
std::chrono::steady_clock::time_point begin =
std::chrono::steady_clock::now();
renderer.render(&testModel, mat4::translation(vec3(0.0f, -1.0f, 5.0f)) *
mat4::rotateOnY(-1.5707963267948966f));
std::chrono::steady_clock::time_point end =
std::chrono::steady_clock::now();
std::cout << "Time difference = "
<< std::chrono::duration_cast<std::chrono::milliseconds>(end -
begin)
.count()
<< "[ms]" << std::endl;
uint8_t *pixel = new uint8_t[64 * 64 * 3];
/*for (int i = 0; i < 64 * 64 * 3; i++) {
pixel[i] = target.pixels[i].i >> SHIFT_AMOUNT;
}*/
std::function<void(int, uint32_t *)> addTo = [&target](int start,
uint32_t *arr) {
for (int c = 0; c < 3; c++) {
arr[c] += target.pixels[start + c];
}
};
vec3 pos;
QApplication a(argc, argv);
MainWindow widget;
widget.setWindowTitle("SoftwareRenderer");
// display.setPixmap(QPixmap::fromImage(img).scaled(widget.size()));
auto keyEvent = [&pos](QKeyEvent *e) {
decimal step = decimal(0.5);
switch (e->key()) {
case Qt::Key_W:
pos.z() += step;
break;
case Qt::Key_S:
pos.z() -= step;
break;
case Qt::Key_A:
pos.x() += step;
break;
case Qt::Key_D:
pos.x() -= step;
break;
}
};
widget.keyDownCallBack = keyEvent;
float rot = 0.f;
std::function<void()> renderLoop = [&addTo, &target, &pixel, &renderer,
&widget, &rot, &pos]() {
std::chrono::steady_clock::time_point begin =
std::chrono::steady_clock::now();
target.clearDepth();
target.clearTarget();
// renderer.render(&testModel, mat4::translation(vec3(0.0f,
// -1.0f, 5.0f)) *
// mat4::rotateOnY(rot));
// renderer.render(&testModel, mat4::translation(vec3(1.0f,
// -1.0f, 7.0f)) *
// mat4::rotateOnY(rot));
renderer.render(&plane, mat4::translation(pos));
std::chrono::steady_clock::time_point end =
std::chrono::steady_clock::now();
std::cout << "Time difference = "
<< std::chrono::duration_cast<std::chrono::milliseconds>(
end - begin)
.count()
<< "[ms]" << std::endl;
for (int x = 0; x < 64; x++) {
for (int y = 0; y < 64; y++) {
uint32_t result[3] = {};
addTo((target.width * y * 2 + x * 2) * 3, result);
addTo((target.width * (y * 2 + 1) + x * 2) * 3, result);
addTo((target.width * y * 2 + (x * 2 + 1)) * 3, result);
addTo((target.width * (y * 2 + 1) + (x * 2 + 1)) * 3, result);
for (int c = 0; c < 3; c++) {
pixel[(WIDTH * (WIDTH - y - 1) + WIDTH - x - 1) * 3 + c] =
result[c] >> 2;
}
}
}
// QImage img((unsigned char *)pixel, 64, 64, QImage::Format_RGB888);
widget.updateLabel(pixel);
rot += 0.1f;
};
renderLoop();
widget.show();
QTimer timer;
timer.setInterval(20);
timer.start();
QObject::connect(&timer, &QTimer::timeout, &widget, renderLoop);
return a.exec();
}

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#include "fastmath.hpp"
#include "polygon.hpp"
#include <QApplication>
#include <QImage>
#include <QLabel>
#include <QPixmap>
#include <iostream>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
// testing fastmath.h
/*
void test(vec<2> *in) {
vec<2> v = {{decimal(1.0), decimal(0.5)}};
in = &v;
}*/
int main(int argc, char *argv[]) {
vec3 v1 = vec3(5.0f, 40.0f, 2.0f);
vec3 v2 = vec3(5.0, 10.0, 2.2);
vec3 v3 = v1;
std::cout << v1 << v2 << decimal(0.5) * v2 << (v1 + v2) << v1 * v2 << "\n"
<< v1.cross(v2) << v1.len() << "\n"
<< v1.normalize() << std::endl;
decimal d = decimal(2.0f);
d += decimal(0.5);
std::cout << "\n"
<< decimal(2.0) / decimal(-0.5) << "\n"
<< decimal(2.0).sqrt() << "\n"
<< d << std::endl;
polygon p = {vec3(0.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0), vec3(1.0, 0.0, 0.0)};
std::cout << p.contains(vec3(0.1, 0.1, 0.1)) << std::endl;
mat4 m = mat4::translation({2.0f, 3.0f, 5.0f});
std::cout << matN<3>::identity() * v1 << std::endl;
std::cout << m << std::endl;
std::cout << mat4::identity().cutTo<mat3>() << std::endl;
std::cout << m * vec4(v1, decimal(1.0f)) << std::endl;
std::cout << mat4::rotateOnX(1.5707f) * vec4(1.f, 0.f, 0.f, 0.f)
<< std::endl;
// QApplication a(argc, argv);
//
// uint8_t *pixel = new uint8_t[64 * 64 * 3];
//
// for (int i = 1; i < 64 * 64 * 3; i += 3) {
// pixel[i] = 255;
// }
//
// QWidget widget;
// widget.setAutoFillBackground(true);
// widget.setGeometry(0, 0, 500, 500);
// QLabel display(&widget);
// QImage img((unsigned char *)pixel, 64, 64, QImage::Format_RGB888);
// display.setPixmap(QPixmap::fromImage(img).scaled(widget.size()));
// widget.show();
// return a.exec();
}

16
model.hpp Normal file
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#ifndef MODEL_H
#define MODEL_H
#include "fastmath.hpp"
#include <tuple>
#include <vector>
struct model {
std::vector<vec3> verts;
// At 0 vertecie index, at 1 normal index
std::vector<std::tuple<uint16_t, uint16_t>> faces;
std::vector<vec3> normals;
std::vector<vec3> colors;
};
#endif

2
plane.hpp Normal file
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#include "renderer.h"
const model testModel = create_model((vec3[]){{{7.334897,-2.436740,4.541961},{-7.899121,-2.436740,4.541961},{7.334897,-2.436740,35.009995},{-7.899121,-2.436740,35.009995}},(int[]){{1,0},{2,0},{0,0},{1,0},{3,0},{2,0}});

12
plane.mtl Normal file
View File

@@ -0,0 +1,12 @@
# Blender 5.1.0 MTL File: 'test.blend'
# www.blender.org
newmtl Material.001
Ns 0.000000
Ka 1.000000 1.000000 1.000000
Kd 0.800000 0.800000 0.800000
Ks 0.500000 0.500000 0.500000
Ke 0.000000 0.000000 0.000000
Ni 1.500000
d 1.000000
illum 2

160
polygon.hpp Normal file
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#ifndef POLYGON_H
#define POLYGON_H
#include "fastmath.hpp"
#include <iostream>
struct polygon {
vec3 points[3];
decimal delta[9];
bool small = false;
decimal baryFactor;
decimal dot00;
decimal dot01;
decimal dot11;
vec2 v0;
vec2 v1;
decimal bounding[4]; // min x, max x, min y, max y
vec3 normals[3];
vec3 colors[3];
vec3 barycentrics;
vec3 boundingBarycentrics;
void calcDelta() {
// for (int i = 0; i < 3; i++) {
// int n = (i + 1) % 3;
//
// delta[i * 3] = points[i].y() - points[n].y();
// delta[i * 3 + 1] = points[n].x() - points[i].x();
// delta[i * 3 + 2] =
// points[i].x() * points[n].y() - points[i].y() *
// points[n].x();
// if (delta[i * 3].i == 0 && delta[i * 3 + 1].i == 0)
// small = true;
// }
v0 = vec2(points[2]) - vec2(points[0]);
v1 = vec2(points[1]) - vec2(points[0]);
dot00 = v0 * v0;
dot01 = v1 * v0;
dot11 = v1 * v1;
bounding[0] = points[0].x();
bounding[1] = points[0].x();
bounding[2] = points[0].y();
bounding[3] = points[0].y();
for (int i = 1; i < 3; i++) {
if (bounding[0] > points[i].x())
bounding[0] = points[i].x();
if (bounding[1] < points[i].x())
bounding[1] = points[i].x();
if (bounding[2] > points[i].y())
bounding[2] = points[i].y();
if (bounding[3] < points[i].y())
bounding[3] = points[i].y();
}
// baryFactor =
// (points[1].x() - points[0].x()) * (points[2].y() - points[1].y())
// - (points[1].y() - points[0].y()) * (points[2].x() -
// points[1].x());
std::cout << dot00 << " " << dot01 << " " << dot11 << std::endl;
baryFactor = dot00 * dot11 - dot01 * dot01;
std::cout << "baryFactor:" << baryFactor << std::endl;
if (baryFactor.i == 0) {
small = true;
} else
baryFactor = decimal(1.0) / baryFactor;
// std::cout << baryFactor << std::endl;
/*if ((bounding[1].i - bounding[0].i < 1 << HALF_SHIFT) &&
(bounding[3].i - bounding[2].i < 1 << HALF_SHIFT))
small = true;*/
}
vec3 avgNormal() {
vec3 result = normals[0] + normals[1] + normals[2];
// for (int i = 0; i < 3; i++) {
// result += normals[i];
// }
return result * decimal(0.3333);
}
const bool depContains(const vec3 &p) {
// if (skip)
// return false;
for (int i = 0; i < 3; i++) {
if (small)
return false;
vec3 d = p;
if ((d.x() * delta[i * 3] + d.y() * delta[i * 3 + 1] +
delta[i * 3 + 2]) > decimal(0.2))
return false;
}
return true;
}
const bool contains(const vec3 &p) {
if (small)
return true;
else
return (barycentrics[0] >= decimal(-0.0)) &&
(barycentrics[1] >= decimal(-0.0)) &&
(barycentrics[0] + barycentrics[1] <= decimal(1.0));
}
friend std::ostream &operator<<(std::ostream &os, const polygon &p) {
for (int i = 0; i < 3; i++) {
os << p.points[i];
}
return os;
}
vec3 calcNormal() {
return normals[0] * boundingBarycentrics[0] +
normals[1] * boundingBarycentrics[1] +
normals[2] * boundingBarycentrics[2];
}
vec3 calcColor() {
return colors[0] * boundingBarycentrics[0] +
colors[1] * boundingBarycentrics[1] +
colors[2] * boundingBarycentrics[2];
}
decimal calcDepth() {
return points[0].z() * boundingBarycentrics[0] +
points[1].z() * boundingBarycentrics[1] +
points[2].z() * boundingBarycentrics[2];
}
void calcBarycentric(vec3 s) {
// if (small)
// return vec3(decimal(0.333), decimal(0.333), decimal(0.333));
vec2 v2 = vec2(s) - vec2(points[0]);
decimal dot02 = v0 * v2;
decimal dot12 = v1 * v2;
barycentrics = {};
barycentrics[0] = dot11 * dot02 - dot01 * dot12;
barycentrics[1] = dot00 * dot12 - dot01 * dot02;
// barycentrics[0] = (points[1].x() - s.x()) * (points[2].y() -
// s.y()) -
// (points[2].x() - s.x()) * (points[1].y() -
// s.y());
// barycentrics[1] = (points[2].x() - s.x()) * (points[0].y() -
// s.y()) -
// (points[0].x() - s.x()) * (points[2].y() -
// s.y());
barycentrics = barycentrics * baryFactor;
barycentrics[2] = decimal(1.0) - barycentrics[1] - barycentrics[0];
// barycentrics[0]; return result;
boundingBarycentrics = vec3::max(
vec3::min(barycentrics, vec3(1.0, 1.0, 1.0)), vec3(0.0, 0.0, 0.0));
}
};
#endif

144
renderer.hpp Normal file
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#ifndef RENDERER_H
#define RENDERER_H
#include "fastmath.hpp"
#include "model.hpp"
#include "polygon.hpp"
#include "rendertarget.hpp"
#include <cstring>
#include <memory.h>
#define SCREEN_SPACE_SIZE 2.0
class Renderer {
public:
Rendertarget *target;
bool clearTarget = true;
vec3 sunDir = vec3(1.0, -1.0, 1.0).normalize();
void toScreenSpace(vec3 *np, mat4 matrix) {
vec4 tp = (matrix * vec4(*np, decimal(1.0f)));
tp.x() = tp.x() / tp.z() * decimal(SCREEN_SPACE_SIZE) +
decimal(SCREEN_SPACE_SIZE);
tp.y() = tp.y() / tp.z() * decimal(SCREEN_SPACE_SIZE) +
decimal(SCREEN_SPACE_SIZE);
*np = vec3(tp.x(), tp.y(), tp.z());
}
void render(const model *model, const mat4 matrix) {
decimal widthScale =
decimal(SCREEN_SPACE_SIZE * 2) / decimal((float)target->width);
decimal heightScale =
decimal(SCREEN_SPACE_SIZE * 2) / decimal((float)target->height);
decimal invWidthScale =
decimal((float)(target->width / SCREEN_SPACE_SIZE / 2));
decimal invHeightScale =
decimal((float)(target->height / SCREEN_SPACE_SIZE / 2));
// TODO clear target with memset
vec3 verts[model->verts.size()] = {};
std::copy(model->verts.begin(), model->verts.end(), verts);
for (int i = 0; i < model->verts.size(); i++) {
toScreenSpace(verts + i, matrix);
}
vec3 normals[model->normals.size()] = {};
mat3 normalMatrix = matrix.cutTo<mat3>();
for (int i = 0; i < model->normals.size(); i++) {
normals[i] = normalMatrix * model->normals[i];
}
polygon testP;
for (int f = 0; f < model->faces.size(); f += 3) {
testP.small = false;
for (int p = 0; p < 3; p++) {
testP.points[p] = verts[std::get<0>(model->faces[f + p])];
testP.colors[p] =
model->colors[std::get<0>(model->faces[f + p])];
testP.normals[p] = normals[std::get<1>(model->faces[f + p])];
}
if ((testP.avgNormal() * vec3(0.0, 0.0, 1.0)) > decimal(0.))
continue;
testP.calcDelta();
int startX = std::max<int>(
(testP.bounding[0] * invWidthScale).i >> SHIFT_AMOUNT, 0);
int endX = std::max<int>(
std::min<int>((testP.bounding[1] * invWidthScale).i >>
SHIFT_AMOUNT,
(uint32_t)target->width - 1),
0);
int startY = std::max<int>(
(testP.bounding[2] * invHeightScale).i >> SHIFT_AMOUNT, 0);
int endY = std::min<int>((testP.bounding[3] * invHeightScale).i >>
SHIFT_AMOUNT,
target->height - 1);
std::cout << "Polys:\n" << testP.baryFactor << "\n";
for (int i = 0; i < 3; i++) {
std::cout << testP.points[i];
}
std::cout << "Boundings:\n";
std::cout << testP.bounding[0] << " " << startX << "\n";
std::cout << testP.bounding[1] << " " << endX << "\n";
std::cout << testP.bounding[2] << " " << startY << "\n";
std::cout << testP.bounding[3] << " " << endY << "\n";
vec3 pos = vec3(testP.bounding[0], testP.bounding[2], 0.0);
for (int x = 0; x < target->width; x++) {
for (int y = 0; y < target->height; y++) {
// for (int x = startX; x < endX; x++) {
// for (int y = startY; y < endY; y++) {
testP.calcBarycentric(pos);
if (testP.contains(pos)) {
// testP.calcBarycentric(pos);
decimal depth = testP.calcDepth();
if (depth < target->getDepth(x, y)) {
// std::cout << factors << std::endl;
vec3 normal = testP.calcNormal();
vec3 color = testP.calcColor();
decimal lightFac =
std::max(normal * (-sunDir), decimal(0.0)) +
decimal(0.5);
;
target->setDepth(x, y, depth);
// target->set(x, y,
// (color * decimal(120.0)) * lightFac);
// target->set(x, y,
// vec3(lightFac * decimal(200.0), 0, 0));
// target->set(x, y,
// (normal + vec3(1.0, 1.0, 1.0)) *
// decimal(120.0));
// target->set(
// x, y,
// (testP.avgNormal() + vec3(1.0, 1.0, 1.0)) *
// decimal(120.0));
target->set(x, y,
testP.barycentrics * decimal(200.0));
// if (!factors.isSmall())
// target->set(x, y, vec3(0., 255.0, 0.));
}
// target->set(x, y, vec3(0.0, 255.0, 0.0));
}
pos.y() += heightScale;
}
pos.y() = decimal(testP.bounding[2]);
pos.x() += widthScale;
}
}
}
};
#endif

45
rendertarget.hpp Normal file
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#ifndef RENDERTARGET_H
#define RENDERTARGET_H
#include "fastmath.hpp"
class Rendertarget {
public:
const int width;
const int height;
Rendertarget(int width, int height) : width(width), height(height) {
pixels = new uint8_t[width * height * 3];
depth = new decimal[width * height];
for (int i = 0; i < width * height * 3; i++) {
pixels[i] = 0;
}
}
void set(int x, int y, vec3 val) {
int start = (width * y + x) * 3;
for (int i = 0; i < 3; i++) {
pixels[start + i] = (uint8_t)(val[i].i >> SHIFT_AMOUNT);
}
}
decimal getDepth(int x, int y) { return depth[width * y + x]; }
void setDepth(int x, int y, decimal val) { depth[width * y + x] = val; }
void clearDepth() {
for (int i = 0; i < width * height; i++) {
depth[i].i = std::numeric_limits<int32_t>::max();
}
}
void clearTarget() {
for (int i = 0; i < width * height * 3; i++) {
pixels[i] = 0;
}
}
uint8_t *pixels;
decimal *depth;
};
#endif

9
switch.sh Executable file
View File

@@ -0,0 +1,9 @@
#!/usr/bin/env bash
if [ -e "mathTest.cpp" ]; then
mv main.cpp oldMain.cpp
mv mathTest.cpp main.cpp
else
mv main.cpp mathTest.cpp
mv oldMain.cpp main.cpp
fi

BIN
test.bin Normal file
View File

Binary file not shown.

BIN
test.fbx Normal file
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Binary file not shown.

297
test.gltf Normal file
View File

@@ -0,0 +1,297 @@
{
"asset":{
"generator":"Khronos glTF Blender I/O v5.1.18",
"version":"2.0"
},
"scene":0,
"scenes":[
{
"name":"Scene.009",
"nodes":[
0,
1,
2
]
}
],
"nodes":[
{
"mesh":0,
"name":"Fairy_Dust_full.002",
"scale":[
0.007043707650154829,
0.007043707650154829,
0.007043707650154829
],
"translation":[
0,
-1.292056679725647,
0
]
},
{
"mesh":1,
"name":"Cylinder.002",
"rotation":[
0,
-0.7071068286895752,
0,
0.7071068286895752
],
"scale":[
0.7209481596946716,
0.7209481596946716,
0.7209481596946716
],
"translation":[
0,
0.47851109504699707,
-10
]
},
{
"mesh":2,
"name":"Suzanne.001",
"translation":[
0,
2.779357671737671,
0
]
}
],
"materials":[
{
"doubleSided":true,
"name":"Material.001",
"pbrMetallicRoughness":{
"metallicFactor":0
}
}
],
"meshes":[
{
"name":"Fairy_Dust_full.002",
"primitives":[
{
"attributes":{
"POSITION":0,
"NORMAL":1
},
"indices":2
}
]
},
{
"name":"Cylinder.002",
"primitives":[
{
"attributes":{
"POSITION":3,
"NORMAL":4,
"TEXCOORD_0":5,
"COLOR_0":6
},
"indices":7,
"material":0
}
]
},
{
"name":"Suzanne",
"primitives":[
{
"attributes":{
"POSITION":8,
"NORMAL":9,
"TEXCOORD_0":10
},
"indices":11
}
]
}
],
"accessors":[
{
"bufferView":0,
"componentType":5126,
"count":444720,
"max":[
151.8914031982422,
630.0626220703125,
133.6092071533203
],
"min":[
-103.52690124511719,
-4.516704088378728e-15,
-133.6092071533203
],
"type":"VEC3"
},
{
"bufferView":1,
"componentType":5126,
"count":444720,
"type":"VEC3"
},
{
"bufferView":2,
"componentType":5125,
"count":471222,
"type":"SCALAR"
},
{
"bufferView":3,
"componentType":5126,
"count":172,
"max":[
1.0631183385849,
2.3016695976257324,
1.0250295400619507
],
"min":[
-1.0094571113586426,
-2.2646777629852295,
-1.0250295400619507
],
"type":"VEC3"
},
{
"bufferView":4,
"componentType":5126,
"count":172,
"type":"VEC3"
},
{
"bufferView":5,
"componentType":5126,
"count":172,
"type":"VEC2"
},
{
"bufferView":6,
"componentType":5126,
"count":172,
"type":"VEC3"
},
{
"bufferView":7,
"componentType":5123,
"count":876,
"type":"SCALAR"
},
{
"bufferView":8,
"componentType":5126,
"count":555,
"max":[
1.3671875,
0.984375,
0.8515625
],
"min":[
-1.3671875,
-0.984375,
-0.8515625
],
"type":"VEC3"
},
{
"bufferView":9,
"componentType":5126,
"count":555,
"type":"VEC3"
},
{
"bufferView":10,
"componentType":5126,
"count":555,
"type":"VEC2"
},
{
"bufferView":11,
"componentType":5123,
"count":2904,
"type":"SCALAR"
}
],
"bufferViews":[
{
"buffer":0,
"byteLength":5336640,
"byteOffset":0,
"target":34962
},
{
"buffer":0,
"byteLength":5336640,
"byteOffset":5336640,
"target":34962
},
{
"buffer":0,
"byteLength":1884888,
"byteOffset":10673280,
"target":34963
},
{
"buffer":0,
"byteLength":2064,
"byteOffset":12558168,
"target":34962
},
{
"buffer":0,
"byteLength":2064,
"byteOffset":12560232,
"target":34962
},
{
"buffer":0,
"byteLength":1376,
"byteOffset":12562296,
"target":34962
},
{
"buffer":0,
"byteLength":2064,
"byteOffset":12563672,
"target":34962
},
{
"buffer":0,
"byteLength":1752,
"byteOffset":12565736,
"target":34963
},
{
"buffer":0,
"byteLength":6660,
"byteOffset":12567488,
"target":34962
},
{
"buffer":0,
"byteLength":6660,
"byteOffset":12574148,
"target":34962
},
{
"buffer":0,
"byteLength":4440,
"byteOffset":12580808,
"target":34962
},
{
"buffer":0,
"byteLength":5808,
"byteOffset":12585248,
"target":34963
}
],
"buffers":[
{
"byteLength":12591056,
"uri":"test.bin"
}
]
}

12
test.mtl Normal file
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@@ -0,0 +1,12 @@
# Blender 5.0.0 MTL File: 'test.blend'
# www.blender.org
newmtl Material.001
Ns 0.000000
Ka 1.000000 1.000000 1.000000
Kd 0.800000 0.800000 0.800000
Ks 0.500000 0.500000 0.500000
Ke 0.000000 0.000000 0.000000
Ni 1.500000
d 1.000000
illum 2

836
test.obj Normal file
View File

@@ -0,0 +1,836 @@
# Blender 5.0.0
# www.blender.org
mtllib test.mtl
o Cylinder.003
v -0.000000 0.757563 0.698513 0.0000 0.4470 0.0334
v -0.000000 2.825787 0.044645 0.0000 0.4470 0.0334
v -0.238906 0.757563 0.656388 0.0000 0.4470 0.0334
v -0.015270 2.825787 0.041953 0.0000 0.4470 0.0334
v -0.448996 0.757563 0.535092 0.0000 0.4470 0.0334
v -0.028697 2.825787 0.034200 0.0000 0.4470 0.0334
v -0.604930 0.757563 0.349257 0.0000 0.4470 0.0334
v -0.038664 2.825787 0.022323 0.0000 0.4470 0.0334
v -0.687901 0.757563 0.043996 0.0000 0.4470 0.0334
v -0.043967 2.825787 0.018354 0.0000 0.4470 0.0334
v -0.687901 0.757563 -0.043996 0.0000 0.4470 0.0334
v -0.043967 2.825787 -0.018354 0.0000 0.4470 0.0334
v -0.604930 0.757563 -0.349257 0.0000 0.4470 0.0334
v -0.038664 2.825787 -0.022323 0.0000 0.4470 0.0334
v -0.448996 0.757563 -0.535092 0.0000 0.4470 0.0334
v -0.028697 2.825787 -0.034200 0.0000 0.4470 0.0334
v -0.238906 0.757563 -0.656388 0.0000 0.4470 0.0334
v -0.015270 2.825787 -0.041953 0.0000 0.4470 0.0334
v -0.000000 0.757563 -0.698513 0.0000 0.4470 0.0334
v -0.000000 2.825787 -0.044645 0.0000 0.4470 0.0334
v 0.238906 0.757563 -0.656388 0.0000 0.4470 0.0334
v 0.015270 2.825787 -0.041953 0.0000 0.4470 0.0334
v 0.448996 0.757563 -0.535092 0.0000 0.4470 0.0334
v 0.028697 2.825787 -0.034200 0.0000 0.4470 0.0334
v 0.604930 0.757563 -0.349257 0.0000 0.4470 0.0334
v 0.038664 2.825787 -0.022323 0.0000 0.4470 0.0334
v 0.687901 0.757563 -0.121296 0.0000 0.4470 0.0334
v 0.043967 2.825787 -0.007753 0.0000 0.4470 0.0334
v 0.687901 0.757563 0.121296 0.0000 0.4470 0.0334
v 0.043967 2.825787 0.007753 0.0000 0.4470 0.0334
v 0.604930 0.757563 0.349257 0.0000 0.4470 0.0334
v 0.038664 2.825787 0.022323 0.0000 0.4470 0.0334
v 0.448996 0.757563 0.535092 0.0000 0.4470 0.0334
v 0.028697 2.825787 0.034200 0.0000 0.4470 0.0334
v 0.238906 0.757563 0.656388 0.0000 0.4470 0.0334
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