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main.c
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main.c
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#include <stdio.h>
#include <GL/glew.h>
#include <SDL2/SDL.h>
#include <stdbool.h>
#include <sys/time.h>
#include <kazmath/kazmath.h>
#include "shader.h"
#include "draw.h"
#include "utils.h"
#include "camera.h"
#include "framebuffer.h"
#include "gui.h"
#include "world.h"
SDL_Window* window = NULL;
SDL_GLContext* context = NULL;
#define SCREEN_HEIGHT 900
#define SCREEN_WIDTH 1600
void MessageCallback( GLenum source,
GLenum type,
GLuint id,
GLenum severity,
GLsizei length,
const GLchar* message,
const void* userParam )
{
fprintf( stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n",
( type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : "" ),
type, severity, message );
}
void initGL() {
glewExperimental = true;
glewInit();
if (glDebugMessageCallbackARB != NULL) {
printf("Hooray!\n");
}
// glEnable(GL_DEBUG_OUTPUT);
// glDebugMessageCallback((GLDEBUGPROC)MessageCallback, 0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
// glEnable(GL_BLEND);
// glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
GLenum error = glGetError();
if (error != GL_NO_ERROR) {
printf("Error initializing GL\n");
printf("%s\n", (const char *) glewGetErrorString(error));
}
// printf("%s\n", glGetString(GL_VERSION));
}
void initSDL() {
SDL_Init(SDL_INIT_VIDEO);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
// SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4);
// SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 5);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
// SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, 32);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_SetRelativeMouseMode(SDL_TRUE);
// Get display size and position accordingly
SDL_DisplayMode DM;
SDL_GetCurrentDisplayMode(0, &DM);
window = SDL_CreateWindow("Mesh optimization", DM.w - SCREEN_WIDTH - 8, 30, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_OPENGL);
context = SDL_GL_CreateContext(window);
SDL_GL_SetSwapInterval(1);
}
bool keymap[SDL_NUM_SCANCODES];
bool mousemap[255];
float debugSpecularPower = 20;
bool showNormals = false;
bool instaBreak = false;
void updateKeyHandles() {
float dist = 0.5f;
if (keymap[SDL_SCANCODE_LEFT] || keymap[SDL_SCANCODE_A]) {
kmVec3 left;
kmVec3Cross(&left, &cameraMain.direction, &cameraMain.up);
kmVec3Normalize(&left, &left);
kmVec3Scale(&left, &left, -dist);
kmVec3Add(&cameraMain.pos, &cameraMain.pos, &left);
} else if (keymap[SDL_SCANCODE_RIGHT] || keymap[SDL_SCANCODE_D]) {
kmVec3 left;
kmVec3Cross(&left, &cameraMain.direction, &cameraMain.up);
kmVec3Normalize(&left, &left);
kmVec3Scale(&left, &left, dist);
kmVec3Add(&cameraMain.pos, &cameraMain.pos, &left);
} else if (keymap[SDL_SCANCODE_DOWN] || keymap[SDL_SCANCODE_S]) {
kmVec3 s;
kmVec3Scale(&s, &cameraMain.direction, -dist);
kmVec3Add(&cameraMain.pos, &cameraMain.pos, &s);
} else if (keymap[SDL_SCANCODE_UP] || keymap[SDL_SCANCODE_W]) {
kmVec3 s;
kmVec3Scale(&s, &cameraMain.direction, dist);
kmVec3Add(&cameraMain.pos, &cameraMain.pos, &s);
} else if (keymap[SDL_SCANCODE_ESCAPE]) {
SDL_SetRelativeMouseMode(SDL_FALSE);
glUniform3f(_U(_mouseOutColor), -0.1f, -0.1f, -0.1f);
} else if (keymap[SDL_SCANCODE_1]) {
debugSpecularPower += 0.5;
glUniform1f(_U(specularPower), debugSpecularPower);
} else if (keymap[SDL_SCANCODE_2]) {
debugSpecularPower -= 0.5;
glUniform1f(_U(specularPower), debugSpecularPower);
} else if (keymap[SDL_SCANCODE_F9]) {
GLuint aux = programs[GE_PROGRAM_MAIN];
programs[GE_PROGRAM_MAIN] = programs[GE_PROGRAM_WIREFRAME];
programs[GE_PROGRAM_WIREFRAME] = aux;
} else if (keymap[SDL_SCANCODE_F10]) {
showNormals = !showNormals;
GLint programID;
glGetIntegerv(GL_CURRENT_PROGRAM, &programID);
glUseProgram(programs[GE_PROGRAM_MAIN]);
printf("showNormals: %u %u\n", _U(showNormals), showNormals);
glUniform1i(_U(showNormals), showNormals);
glUseProgram((GLuint) programID);
} else if (keymap[SDL_SCANCODE_F11]) {
instaBreak = !instaBreak;
}
}
void updateMouseHandles(int x, int y) {
if (mousemap[SDL_BUTTON_LEFT]) {
if (!SDL_GetRelativeMouseMode()) {
SDL_SetRelativeMouseMode(SDL_TRUE);
glUniform3f(_U(_mouseOutColor), 0, 0, 0);
} else {
kmVec3 raycast = geCameraRaycast(&cameraMain, &worldMain);
if (raycast.x != -1 || raycast.y != -1 || raycast.z != -1) {
geWorldRemoveBlock(&worldMain, &raycast);
geShapeBuffer(&worldMain.shape);
} else {
raycast = geCameraRaycast(&cameraMain, &worldsSecondary[0]);
if (raycast.x != -1 || raycast.y != -1 || raycast.z != -1) {
kmVec3Subtract(&raycast, &raycast, &worldsSecondary[0].object->pos);
geWorldRemoveBlock(&worldsSecondary[0], &raycast);
geShapeBuffer(&worldsSecondary[0].shape);
} else {
raycast = geCameraRaycast(&cameraMain, &worldsSecondary[1]);
if (raycast.x != -1 || raycast.y != -1 || raycast.z != -1) {
kmVec3Subtract(&raycast, &raycast, &worldsSecondary[1].object->pos);
geWorldRemoveBlock(&worldsSecondary[1], &raycast);
geShapeBuffer(&worldsSecondary[1].shape);
}
}
}
}
}
if (mousemap[SDL_BUTTON_RIGHT]) {
if (linePointer != NULL) {
memcpy(&linePointer->rotation, &cameraMain.rotation, sizeof(kmVec3));
memcpy(&linePointer->pos, &cameraMain.pos, sizeof(kmVec3));
}
}
}
int main(int argc, char** argv) {
initSDL();
initGL();
initAllShaders();
initScene();
initGUI();
glUseProgram(programs[GE_PROGRAM_MAIN]);
glUniform1f(_U(specularPower), debugSpecularPower);
SDL_Event e;
memset(&cameraMain, 0, sizeof(cameraMain));
cameraMain.up.y = 1;
cameraMain.pos.y = 0.1f;
cameraMain.aspectRatio = 16.0f / 9.0f;
bool loop = true;
while(loop) {
struct timeval stop, start;
gettimeofday(&start, NULL);
if (instaBreak) {
updateMouseHandles(e.button.x, e.button.y);
}
while (SDL_PollEvent(&e)) {
if (e.type == SDL_QUIT) {
loop = false;
} else if (e.type == SDL_KEYDOWN) {
keymap[e.key.keysym.scancode] = true;
updateKeyHandles();
} else if (e.type == SDL_KEYUP) {
keymap[e.key.keysym.scancode] = false;
updateKeyHandles();
} else if (e.type == SDL_MOUSEBUTTONDOWN) {
mousemap[e.button.button] = true;
updateMouseHandles(e.button.x, e.button.y);
} else if (e.type == SDL_MOUSEBUTTONUP) {
mousemap[e.button.button] = false;
updateMouseHandles(e.button.x, e.button.y);
} else if (e.type == SDL_MOUSEMOTION) {
if (SDL_GetRelativeMouseMode()) {
cameraMain.rotation.y += -e.motion.xrel / 16.0f;
cameraMain.rotation.x += -e.motion.yrel / 16.0f;
if (cameraMain.rotation.x > 85.0f) {
cameraMain.rotation.x = 85.0f;
} else if (cameraMain.rotation.x < -85.0f) {
cameraMain.rotation.x = -85.0f;
}
if (cameraMain.rotation.y > 360.0f) {
cameraMain.rotation.y -= 360.0f;
} else if (cameraMain.rotation.y < 0) {
cameraMain.rotation.y += 360.0f;
}
}
}
}
SDL_GL_SwapWindow(window);
// renderMirror();
// renderShadowMap();
glUseProgram(programs[GE_PROGRAM_MAIN]);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
update();
glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
drawScene();
drawGUI();
gettimeofday(&stop, NULL);
// printf("took %lf\n", 1000000.0 / ((stop.tv_usec - start.tv_usec)));
}
clearScene();
geWorldDestroy(&worldMain);
SDL_DestroyWindow(window);
SDL_GL_DeleteContext(context);
}