initial commit

1 files changed, 199 insertions, 0 deletions

diff --git a/sim.c b/sim.c
new file mode 100644
index 0000000..638571d
--- /dev/null
+++ b/sim.c
@@ -0,0 +1,199 @@
+/* #include <stdio.h> */
+#include <math.h>
+#include <SDL2/SDL.h>
+
+#include "sim.h"
+#include "draw.h"
+#include "types.h"
+
+#define MOUSE_LOCK 1
+
+float hfov, vfov;
+float PI;
+Camera cam;
+uint fps = 30;
+
+SDL_Window *win;
+void *ren;
+
+typedef struct{
+	SDL_Keymod mod;
+	SDL_Keycode sym;
+	void (*func)(const Arg *);
+	const Arg arg;
+} Key;
+
+int
+main_init()
+{
+	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+		fprintf(stderr, "%s:%d:main_init() error %s", __FILE__, __LINE__, SDL_GetError());
+		return 1;
+	}
+
+	win = SDL_CreateWindow("3D Sim",
+			SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
+			2*w, 2*h, SDL_WINDOW_RESIZABLE);
+	if (win == NULL) {
+		fprintf(stderr, "%s:%d:main_init() error %s", __FILE__, __LINE__, SDL_GetError());
+		return 1;
+	}
+
+	ren = SDL_CreateRenderer(win, -1, 0);
+	if (ren == NULL) {
+		fprintf(stderr, "%s:%d:main_init() error %s", __FILE__, __LINE__, SDL_GetError());
+		return 1;
+	}
+	SDL_RenderSetLogicalSize(ren, w, h);
+	/* SDL_RenderSetScale(ren, 2, 2); */
+
+	if (draw_init())
+		return 1;
+
+	return 0;
+}
+
+int
+main_quit()
+{
+	SDL_DestroyWindow(win);
+	SDL_Quit();
+	return 1;
+}
+
+int
+main_event()
+{
+	static SDL_Event event;
+	static uint inp = MOUSE_LOCK * 1024;
+	static double s = 0.5;
+	uint8 q;
+
+	while(SDL_PollEvent(&event)) {
+		switch (event.type) {
+		case SDL_QUIT:
+			q = 1;
+			break;
+		case SDL_KEYDOWN:
+			if (event.key.keysym.sym == SDLK_q)
+				q = 1;
+			switch (event.key.keysym.sym) {
+			case SDLK_w:     inp |= 1; break;
+			case SDLK_s:     inp |= 2; break;
+			case SDLK_a:     inp |= 4; break;
+			case SDLK_d:     inp |= 8; break;
+			case SDLK_RIGHT: inp |= 16; break;
+			case SDLK_LEFT:  inp |= 32; break;
+			case SDLK_UP:    inp |= 64; break;
+			case SDLK_DOWN:  inp |= 128; break;
+			case SDLK_j:     inp |= 256; break;
+			case SDLK_k:     inp |= 512; break;
+			case SDLK_m:     inp ^= 1024; break;
+			case SDLK_i:     add_obj_interactive(); break;
+			case SDLK_r:     redo_obj(); break;
+			case SDLK_EQUALS: s += 0.1; break;
+			case SDLK_MINUS: s -= 0.1; break;
+			}
+			break;
+		case SDL_KEYUP:
+			switch (event.key.keysym.sym) {
+			case SDLK_w:     inp &= (inp^1); break;
+			case SDLK_s:     inp &= (inp^2); break;
+			case SDLK_a:     inp &= (inp^4); break;
+			case SDLK_d:     inp &= (inp^8); break;
+			case SDLK_RIGHT: inp &= (inp^16); break;
+			case SDLK_LEFT:  inp &= (inp^32); break;
+			case SDLK_UP:    inp &= (inp^64); break;
+			case SDLK_DOWN:  inp &= (inp^128); break;
+			case SDLK_j:     inp &= (inp^256); break;
+			case SDLK_k:     inp &= (inp^512); break;
+			}
+			break;
+		case SDL_MOUSEMOTION:
+			if (~inp & 1024) break;
+			cam.azim -= ((float)event.motion.yrel)/25.0;
+			cam.rad  += ((float)event.motion.xrel)/25.0;
+			break;
+		}
+	}
+
+	if (inp&1024)
+		SDL_SetRelativeMouseMode(SDL_TRUE);
+	else
+		SDL_SetRelativeMouseMode(SDL_FALSE);
+
+	if (inp&1) {
+		cam.pos.x += cos(cam.rad) * s;
+		cam.pos.z += sin(cam.rad) * s;
+	}
+	if (inp&2) {
+		cam.pos.x -= cos(cam.rad) * s;
+		cam.pos.z -= sin(cam.rad) * s;
+	}
+	if (inp&4) {
+		cam.pos.x += sin(cam.rad) * s;
+		cam.pos.z -= cos(cam.rad) * s;
+	}
+	if (inp&8) {
+		cam.pos.x -= sin(cam.rad) * s;
+		cam.pos.z += cos(cam.rad) * s;
+	}
+
+	if (inp&256) cam.pos.y -= s;
+	if (inp&512) cam.pos.y += s;
+	if (inp&16)
+		cam.rad += 0.05;
+	if (inp&32)
+		cam.rad -= 0.05;
+
+	if (inp&64)
+		cam.azim += 0.05;
+	if (inp&128)
+		cam.azim -= 0.05;
+
+	if (cam.azim < 0)
+		cam.azim += 2.0 * PI;
+	if (cam.azim > 2.0 * PI)
+		cam.azim -= 2.0 * PI;
+
+	if (cam.rad < 0)
+		cam.rad += 2.0 * PI;
+	if (cam.rad > 2.0 * PI)
+		cam.rad -= 2.0 * PI;
+
+	if (q)
+		return main_quit();
+
+	if (draw_screen())
+		return 1;
+
+	return 0;
+}
+
+int main()
+{
+	Uint32 ltick, fdif;
+	cam.pos.x = cam.pos.z = 0;
+	cam.pos.y = 10;
+	cam.rad = cam.azim = 0;
+	PI = 4.0 * atan(1);
+	h = 288;
+	w = 384;
+	hfov = 1;
+
+	if (main_init())
+		return 1;
+
+	vfov = 0.75;
+
+	fdif = 1000 / fps;
+	while (1) {
+		ltick = SDL_GetTicks();
+		if (main_event())
+			break;
+		ltick = SDL_GetTicks() - ltick;
+
+		if (ltick < fdif)
+			SDL_Delay(fdif - ltick);
+	}
+}