mirror of
https://git.coom.tech/drummyfish/small3dlib.git
synced 2024-11-21 20:39:57 +01:00
401 lines
8.9 KiB
C
401 lines
8.9 KiB
C
/*
|
|
author: Miloslav Ciz
|
|
license: CC0
|
|
*/
|
|
|
|
#include <SDL2/SDL.h>
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
#include <time.h>
|
|
|
|
//#define S3L_PRESET_HIGHEST_QUALITY
|
|
|
|
#define S3L_FLAT 0
|
|
#define S3L_STRICT_NEAR_CULLING 1
|
|
#define S3L_PERSPECTIVE_CORRECTION 1
|
|
#define S3L_SORT 0
|
|
#define S3L_Z_BUFFER 1
|
|
|
|
#define S3L_PIXEL_FUNCTION drawPixel
|
|
|
|
#define S3L_RESOLUTION_X 640
|
|
#define S3L_RESOLUTION_Y 480
|
|
|
|
#include "small3dlib.h"
|
|
|
|
#include "house.h"
|
|
|
|
int32_t offScreenPixels = 0;
|
|
const S3L_Unit ver[] = { S3L_CUBE_VERTICES };
|
|
const S3L_Index tri[] = { S3L_CUBE_TRIANGLES };
|
|
const S3L_Unit tex_coords[] = { S3L_CUBE_TEXCOORDS(16) };
|
|
|
|
S3L_Model3D models[2];
|
|
S3L_Scene scene;
|
|
|
|
int8_t keys[256];
|
|
|
|
const uint8_t testTexture[] =
|
|
/*
|
|
{
|
|
2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2,
|
|
2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
|
|
2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
|
|
0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,
|
|
0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
|
|
2,0,0,0,0,1,1,1,1,1,0,0,0,0,0,2,
|
|
2,0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,
|
|
2,0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,
|
|
2,0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,
|
|
0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,
|
|
0,0,2,2,0,0,0,0,0,0,0,0,1,1,0,0,
|
|
2,0,2,2,0,0,0,0,0,0,0,0,1,1,0,2,
|
|
2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
|
|
2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2
|
|
};
|
|
*/
|
|
{
|
|
0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,
|
|
1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
|
|
2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,
|
|
0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,
|
|
1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
|
|
2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,
|
|
0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,
|
|
1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
|
|
2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,
|
|
0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,
|
|
1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
|
|
2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,
|
|
0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,
|
|
1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
|
|
2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,2
|
|
};
|
|
|
|
uint32_t pixels[S3L_RESOLUTION_X * S3L_RESOLUTION_Y];
|
|
|
|
uint32_t frame = 0;
|
|
|
|
void clearScreen()
|
|
{
|
|
memset(pixels,0,S3L_RESOLUTION_X * S3L_RESOLUTION_Y * sizeof(uint32_t));
|
|
}
|
|
|
|
static inline void setPixel(int x, int y, uint8_t red, uint8_t green, uint8_t blue)
|
|
{
|
|
if (x < 0 || x >= S3L_RESOLUTION_X || y < 0 || y >= S3L_RESOLUTION_Y)
|
|
return;
|
|
|
|
uint32_t r = red & 0x000000FF;
|
|
r = r << 24;
|
|
|
|
uint32_t g = green & 0x000000FF;
|
|
g = g << 16;
|
|
|
|
uint32_t b = blue & 0x000000FF;
|
|
b = b << 8;
|
|
|
|
pixels[y * S3L_RESOLUTION_X + x] = r | g | b;
|
|
}
|
|
|
|
uint8_t texturePixel(int32_t u, int32_t v)
|
|
{
|
|
u %= 16;
|
|
v %= 16;
|
|
|
|
return testTexture[v * 16 + u];
|
|
}
|
|
|
|
void houseTex(int32_t u, int32_t v, uint8_t *r, uint8_t *g, uint8_t *b)
|
|
{
|
|
if (u < 0)
|
|
u = 0;
|
|
|
|
if (v < 0)
|
|
v = 0;
|
|
|
|
u %= HOUSE_WIDTH;
|
|
v %= HOUSE_HEIGHT;
|
|
|
|
int index = (v * HOUSE_WIDTH + u) * 3;
|
|
|
|
*r = houseTexture[index];
|
|
*g = houseTexture[index + 1];
|
|
*b = houseTexture[index + 2];
|
|
}
|
|
|
|
void drawPixel(S3L_PixelInfo *p)
|
|
{
|
|
if (p->x < 0 || p ->x >= S3L_RESOLUTION_X || p->y < 0 || p->y >= S3L_RESOLUTION_Y)
|
|
{
|
|
offScreenPixels++;
|
|
return;
|
|
}
|
|
|
|
S3L_Unit u, v;
|
|
const S3L_Unit *coords;
|
|
|
|
coords = tex_coords + p->triangleID * 6;
|
|
|
|
if (p->modelID != 0)
|
|
{
|
|
int tmp = p->triangleID * 3;
|
|
|
|
int i0 = houseUVIndices[tmp];
|
|
int i1 = houseUVIndices[tmp + 1];
|
|
int i2 = houseUVIndices[tmp + 2];
|
|
|
|
tmp = i0 * 2;
|
|
|
|
int uv0[2];
|
|
|
|
uv0[0] = houseUVs[tmp];
|
|
uv0[1] = houseUVs[tmp + 1];
|
|
|
|
tmp = i1 * 2;
|
|
|
|
int uv1[2];
|
|
|
|
uv1[0] = houseUVs[tmp];
|
|
uv1[1] = houseUVs[tmp + 1];
|
|
|
|
tmp = i2 * 2;
|
|
|
|
int uv2[2];
|
|
|
|
uv2[0] = houseUVs[tmp];
|
|
uv2[1] = houseUVs[tmp + 1];
|
|
|
|
u = S3L_interpolateBarycentric(
|
|
uv0[0],
|
|
uv1[0],
|
|
uv2[0],
|
|
p->barycentric[0], p->barycentric[1], p->barycentric[2]);
|
|
|
|
v = S3L_interpolateBarycentric(
|
|
uv0[1],
|
|
uv1[1],
|
|
uv2[1],
|
|
p->barycentric[0], p->barycentric[1], p->barycentric[2]);
|
|
|
|
uint8_t r,g,b;
|
|
houseTex(
|
|
(u / ((float) S3L_FRACTIONS_PER_UNIT)) * HOUSE_WIDTH,
|
|
(v / ((float) S3L_FRACTIONS_PER_UNIT)) * HOUSE_HEIGHT,
|
|
&r,&g,&b);
|
|
setPixel(p->x,p->y,r,g,b);
|
|
}
|
|
else
|
|
{
|
|
u = S3L_interpolateBarycentric(
|
|
coords[0],
|
|
coords[2],
|
|
coords[4],
|
|
p->barycentric[0], p->barycentric[1], p->barycentric[2]);
|
|
|
|
v = S3L_interpolateBarycentric(
|
|
coords[1],
|
|
coords[3],
|
|
coords[5],
|
|
p->barycentric[0], p->barycentric[1], p->barycentric[2]);
|
|
|
|
uint8_t col = texturePixel(u,v);
|
|
setPixel(p->x,p->y,col,col * 30,(2 - col) * 120);
|
|
}
|
|
|
|
// uint8_t dep = (p->depth / 5000.0) * 255;
|
|
|
|
// setPixel(p->x,p->y, (p->triangleID * 60) % 255, (p->triangleID * 170) % 255, (p->triangleID * 10) % 255 );
|
|
|
|
//setPixel(p->x,p->y,sss, (p->triangleID * 37) % 255 ,128);
|
|
|
|
//setPixel(p->x,p->y,p->modelID * 64,p->modelID * 128,255);
|
|
|
|
// setPixel(p->x,p->y,p->barycentric0 / ((float) S3L_FRACTIONS_PER_UNIT) * 255,p->barycentric1 / ((float) S3L_FRACTIONS_PER_UNIT) * 255,p->barycentric2 / ((float) S3L_FRACTIONS_PER_UNIT) * 255);
|
|
}
|
|
|
|
S3L_Transform3D modelTransform;
|
|
S3L_DrawConfig conf;
|
|
|
|
clock_t nextT;
|
|
|
|
int fps = 0;
|
|
|
|
void draw()
|
|
{
|
|
S3L_newFrame();
|
|
|
|
offScreenPixels = 0;
|
|
|
|
clearScreen();
|
|
|
|
uint32_t f = frame;
|
|
|
|
//scene.models[0].transform.rotation.z = f * 0.1;
|
|
//scene.models[0].transform.rotation.x = f * 0.3;
|
|
|
|
S3L_drawScene(scene);
|
|
|
|
if (offScreenPixels > 0)
|
|
printf("offscreen pixels: %d\n",offScreenPixels);
|
|
|
|
clock_t nowT = clock();
|
|
|
|
double timeDiff = ((double) (nowT - nextT)) / CLOCKS_PER_SEC;
|
|
|
|
fps++;
|
|
|
|
if (timeDiff >= 1.0)
|
|
{
|
|
nextT = nowT;
|
|
printf("FPS: %d\n",fps);
|
|
fps = 0;
|
|
}
|
|
}
|
|
|
|
int main()
|
|
{
|
|
SDL_Window *window = SDL_CreateWindow("test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, S3L_RESOLUTION_X, S3L_RESOLUTION_Y, SDL_WINDOW_SHOWN);
|
|
SDL_Renderer *renderer = SDL_CreateRenderer(window,-1,0);
|
|
SDL_Texture *texture = SDL_CreateTexture(renderer,SDL_PIXELFORMAT_RGBX8888, SDL_TEXTUREACCESS_STATIC, S3L_RESOLUTION_X, S3L_RESOLUTION_Y);
|
|
SDL_Surface *screenSurface = SDL_GetWindowSurface(window);
|
|
SDL_Event event;
|
|
|
|
nextT = clock();
|
|
|
|
S3L_initCamera(&scene.camera);
|
|
|
|
// scene.camera.transform.translation.z = -S3L_FRACTIONS_PER_UNIT * 2;
|
|
|
|
scene.camera.transform.translation.x = 105;
|
|
scene.camera.transform.translation.y = 469;
|
|
scene.camera.transform.translation.z = 9;
|
|
|
|
scene.camera.transform.rotation.x = -35;
|
|
scene.camera.transform.rotation.y = 128;
|
|
scene.camera.transform.rotation.z = 0;
|
|
|
|
scene.modelCount = 2;
|
|
scene.models = models;
|
|
|
|
scene.models[0].vertices = ver;
|
|
scene.models[0].vertexCount = S3L_CUBE_VERTEX_COUNT;
|
|
scene.models[0].triangles = tri;
|
|
scene.models[0].triangleCount = S3L_CUBE_TRIANGLE_COUNT;
|
|
S3L_initTransoform3D(&(scene.models[0].transform));
|
|
S3L_initDrawConfig(&(scene.models[0].config));
|
|
scene.models[0].transform.translation.x = S3L_FRACTIONS_PER_UNIT;
|
|
|
|
// scene.models[1] = scene.models[0];
|
|
// scene.models[1].transform.translation.x = 0.5 * S3L_FRACTIONS_PER_UNIT;
|
|
|
|
scene.models[1] = house;
|
|
S3L_initTransoform3D(&(scene.models[1].transform));
|
|
S3L_initDrawConfig(&(scene.models[1].config));
|
|
scene.models[1].transform.translation.y = -1 * S3L_FRACTIONS_PER_UNIT;
|
|
scene.models[1].transform.translation.z = 4 * S3L_FRACTIONS_PER_UNIT;
|
|
|
|
// scene.camera.transform.translation.x = S3L_FRACTIONS_PER_UNIT;
|
|
// scene.camera.transform.translation.y = S3L_FRACTIONS_PER_UNIT;
|
|
|
|
S3L_initTransoform3D(&modelTransform);
|
|
S3L_initDrawConfig(&conf);
|
|
|
|
int running = 1;
|
|
|
|
for (int i = 0; i < 256; ++i)
|
|
keys[i] = 0;
|
|
|
|
while (running)
|
|
{
|
|
draw();
|
|
SDL_UpdateTexture(texture,NULL,pixels,S3L_RESOLUTION_X * sizeof(uint32_t));
|
|
|
|
int code = 0;
|
|
|
|
while (SDL_PollEvent(&event))
|
|
{
|
|
switch (event.type)
|
|
{
|
|
case SDL_QUIT:
|
|
running = 0;
|
|
break;
|
|
|
|
case SDL_KEYDOWN:
|
|
code = 'a' + event.key.keysym.scancode - SDL_SCANCODE_A;
|
|
|
|
if (code >= 0 && code <= 255)
|
|
keys[code] = 1;
|
|
|
|
break;
|
|
|
|
case SDL_KEYUP:
|
|
code = 'a' + event.key.keysym.scancode - SDL_SCANCODE_A;
|
|
|
|
if (code >= 0 && code <= 255)
|
|
keys[code] = 0;
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
S3L_Vec4 camF, camR, camU;
|
|
int step = 10;
|
|
|
|
S3L_rotationToDirections(
|
|
scene.camera.transform.rotation,
|
|
step,
|
|
&camF,
|
|
&camR,
|
|
&camU);
|
|
|
|
if (keys['w'])
|
|
S3L_vec3Add(&scene.camera.transform.translation,camF);
|
|
|
|
if (keys['s'])
|
|
S3L_vec3Sub(&scene.camera.transform.translation,camF);
|
|
|
|
if (keys['d'])
|
|
S3L_vec3Add(&scene.camera.transform.translation,camR);
|
|
|
|
if (keys['a'])
|
|
S3L_vec3Sub(&scene.camera.transform.translation,camR);
|
|
|
|
if (keys['c'])
|
|
S3L_vec3Add(&scene.camera.transform.translation,camU);
|
|
|
|
if (keys['x'])
|
|
S3L_vec3Sub(&scene.camera.transform.translation,camU);
|
|
|
|
if (keys['q'])
|
|
scene.camera.transform.rotation.y -= 1;
|
|
|
|
if (keys['e'])
|
|
scene.camera.transform.rotation.y += 1;
|
|
|
|
if (keys['r'])
|
|
scene.camera.transform.rotation.x -= 1;
|
|
|
|
if (keys['t'])
|
|
scene.camera.transform.rotation.x += 1;
|
|
|
|
if (keys['f'])
|
|
scene.camera.transform.rotation.z -= 1;
|
|
|
|
if (keys['g'])
|
|
scene.camera.transform.rotation.z += 1;
|
|
|
|
SDL_RenderClear(renderer);
|
|
SDL_RenderCopy(renderer,texture,NULL,NULL);
|
|
SDL_RenderPresent(renderer);
|
|
|
|
frame++;
|
|
}
|
|
|
|
return 0;
|
|
}
|