From b50d18f3f882865a94458c7113aedd7a0cccce80 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Fri, 25 Jun 2010 23:05:47 +0200
Subject: Moved Application to wriggle.

---
 engine/engine.cpp | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 engine/engine.cpp

(limited to 'engine/engine.cpp')

diff --git a/engine/engine.cpp b/engine/engine.cpp
new file mode 100644
index 0000000..4c7d426
--- /dev/null
+++ b/engine/engine.cpp
@@ -0,0 +1,159 @@
+#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 - Config::viewport_overscan,
+		v_y - Config::viewport_overscan,
+		v_w + Config::viewport_overscan * 2,
+		v_h + Config::viewport_overscan * 2);
+	glScissor(v_x, v_y, v_w, v_h);
+	glEnable(GL_SCISSOR_TEST);
+	
+	glClearColor(0.2, 0.2, 0.2, 0);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	gluPerspective(45, (float)660 / (float)740, 1, 100);
+	
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	
+	float f = tick * 0.0005;
+	
+	gluLookAt(
+		5 * sinf(f), 1, 5 * cosf(f),
+		0, 0, 0,
+		5 * sinf(f), 2, 5 * cosf(f));
+	
+	glBegin(GL_LINES);
+	for(int i = -10; i < 11; i++) {
+		if(i % 5 == 0)
+			glColor3f(1, 1, 1);
+		else
+			glColor3f(.5, .5, .5);
+		glVertex3f(i, 0, -10);
+		glVertex3f(i, 0, 10);
+		glVertex3f(-10, 0, i);
+		glVertex3f(10, 0, i);
+	}
+	glEnd();
+	
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(
+		-float(Config::viewport_overscan) / float(v_w),
+		1.0 + float(Config::viewport_overscan) / float(v_w),
+		-float(Config::viewport_overscan) / float(v_w),
+		Config::viewport_aspect + float(Config::viewport_overscan) / float(v_w),
+		0, 10);
+	
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	
+	stage->draw();
+	
+	glDisable(GL_SCISSOR_TEST);
+	
+	SDL_GL_SwapBuffers();
+}
-- 
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