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#include "engine.h"
#include "config.h"
#include <wriggle/texturesdl.h>
#include <SDL/SDL_opengl.h>
#include <iostream>
#include <cmath>
#include <boost/format.hpp>
void Engine::event_keypress(SDLKey key) {
switch(key) {
case SDLK_SPACE:
paused = !paused;
break;
default:
Application::event_keypress(key);
}
}
Engine::Engine() {
init_window(Config::window_w, Config::window_h);
// Texturing
glEnable(GL_TEXTURE_2D);
// Blending
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
// Smooth shading
glShadeModel(GL_SMOOTH);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glEnable(GL_POINT_SPRITE);
glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glClearColor(0, 0, 0, 0);
glClearDepth(1);
font = new FTTextureFont("fonts/VeraMono.ttf");
font->FaceSize(20);
background = new TextureSDL("textures/background.png");
paused = false;
}
void Engine::update() {
if(!paused) {
stage->update();
}
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, Config::window_w, Config::window_h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
float xo = float(Config::window_w)/float(Config::window_h)/2.5 - 0.5;
glOrtho(-xo, 1 + xo, 0, 0.8, 0, 10);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBindTexture(GL_TEXTURE_2D, background->tex());
glBegin(GL_QUADS);
glTexCoord2f(0, 1);
glVertex2f(-1.9/9.0, 0);
glTexCoord2f(0, 0);
glVertex2f(-1.9/9.0, 0.8);
glTexCoord2f(1, 0);
glVertex2f(10.9/9.0, 0.8);
glTexCoord2f(1, 1);
glVertex2f(10.9/9.0, 0);
glEnd();
glDisable(GL_TEXTURE_2D);
glColor4f(1, 1, 0, 1);
unsigned int tick = SDL_GetTicks();
if(tick - lastframes >= 1000) {
fps = (float)frames * ((float)(tick - lastframes) / 1000.0f);
frames = 1;
lastframes = tick;
} else {
frames++;
}
glScalef(0.0005, 0.0005, 0.0005);
font->Render((boost::format("FPS: %.2f") % fps).str().c_str());
float v_x = Config::window_w * (Config::viewport_x + xo) / (1 + 2 * xo);
float v_y = Config::window_h * Config::viewport_y;
float v_w = Config::window_h * Config::viewport_w;
float v_h = Config::window_h * Config::viewport_h;
glViewport(v_x - v_w * 0.5, v_y - v_h * 0.5, v_w * 2, v_h * 2);
glScissor(v_x, v_y, v_w, v_h);
glEnable(GL_SCISSOR_TEST);
stage->draw();
glDisable(GL_SCISSOR_TEST);
SDL_GL_SwapBuffers();
}
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