1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
#include <common.h>
#include <world.h>
#include <ui.h>
#include <entities.h>
#include <cstdio>
#include <chrono>
SDL_Window *window = NULL;
SDL_Surface *renderSurface = NULL;
SDL_GLContext mainGLContext = NULL;
bool gameRunning = true;
World *currentWorld=NULL;
Player *player;
void logic();
void render();
unsigned int millis(void){
std::chrono::system_clock::time_point now=std::chrono::system_clock::now();
return std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count();
}
int main(int argc, char *argv[]){
// Initialize SDL
if(SDL_Init(SDL_INIT_VIDEO)){
std::cout << "SDL was not able to initialize! Error: " << SDL_GetError() << std::endl;
return -1;
}
atexit(SDL_Quit);
// Initialize SDL_image
if(!(IMG_Init(IMG_INIT_PNG|IMG_INIT_JPG)&(IMG_INIT_PNG|IMG_INIT_JPG))){
std::cout<<"Could not init image libraries!\n"<<std::endl;
return -1;
}
atexit(IMG_Quit);
// Turn on double buffering
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
// Create the window
window = SDL_CreateWindow("Independent Study v.0.2 alpha", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL
#ifdef FULLSCREEN
| SDL_WINDOW_FULLSCREEN
#endif // FULLSCREEN
);
if(window==NULL){
std::cout << "The window failed to generate! Error: " << SDL_GetError() << std::endl;
std::cout << "Window address: "<<window<<std::endl;
return -1;
}
//set OpenGL context
mainGLContext = SDL_GL_CreateContext(window);
if(mainGLContext == NULL){
std::cout << "The OpenGL context failed to initialize! Error: " << SDL_GetError() << std::endl;
return -1;
}
ui::initFonts();
ui::setFontFace("ttf/VCR_OSD_MONO_1.001.ttf");
ui::setFontSize(16);
initRand(millis()); // fix
glViewport(0,0,SCREEN_WIDTH, SCREEN_HEIGHT);
glClearColor(.3,.5,.8,0);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
SDL_ShowCursor(SDL_DISABLE);
/**************************
**** GAMELOOP ****
**************************/
World *test=new World(SCREEN_WIDTH/2);
test->addLayer(400);
currentWorld=test;
player=new Player();
player->spawn(0,100);
while(gameRunning){
render();
logic();
}
/**************************
**** CLOSE PROGRAM ****
**************************/
//closes the window and frees resources
SDL_GL_DeleteContext(mainGLContext);
SDL_DestroyWindow(window);
return 0;
}
void render(){
//a matrix is a blank canvas for the computer to draw on, the matrices are stored in a "stack"
//GL_PROJECTION has 2 matrices
//GL_MODELVIEW has 32 matrices
glMatrixMode(GL_PROJECTION); //set the matrix mode as projection so we can set the ortho size and the camera settings later on
glPushMatrix(); //push the matrix to the top of the matrix stack
glLoadIdentity(); //replace the entire matrix stack with the updated GL_PROJECTION mode
glOrtho(player->loc.x-SCREEN_WIDTH/2,player->loc.x+SCREEN_WIDTH/2,0,SCREEN_HEIGHT,-1,1);
glMatrixMode(GL_MODELVIEW); //set the matrix to modelview so we can draw objects
glPushMatrix(); //push the matrix to the top of the matrix stack
glLoadIdentity(); //replace the entire matrix stack with the updated GL_MODELVIEW mode
glPushMatrix(); //basically here we put a blank canvas (new matrix) on the screen to draw on
glClear(GL_COLOR_BUFFER_BIT); //clear the matrix on the top of the stack
/**************************
**** RENDER STUFF HERE ****
**************************/
currentWorld->draw(&player->loc);
player->draw();
//ui::putString(0,0,"Hello");
/**************************
**** CLOSE THE LOOP ****
**************************/
glPopMatrix(); //take the matrix(s) off the stack to pass them to the renderer
SDL_GL_SwapWindow(window); //give the stack to SDL to render it
}
void logic(){
ui::handleEvents();
currentWorld->detect(&player->loc,&player->vel,player->width);
player->loc.y+=player->vel.y;
player->loc.x+=player->vel.x;
std::cout<<"("<<player->loc.x<<","<<player->loc.y<<")"<<std::endl;
}
|
