Added Application-class.

1 files changed, 286 insertions, 0 deletions

diff --git a/application.cpp b/application.cpp
new file mode 100644
index 0000000..072c7a8
--- /dev/null
+++ b/application.cpp
@@ -0,0 +1,286 @@
+#include "application.h"
+
+#include "texturesdl.h"
+
+#include <SDL/SDL_opengl.h>
+
+#include <iostream>
+#include <stdexcept>
+
+#include <cmath>
+
+class BulletPattern1 : public BulletPattern {
+	unsigned int base;
+	public:
+		BulletPattern1(bool reverse, unsigned int base) {
+			num_bullets = 0;
+			color_r = 1;
+			color_g = 0;
+			color_b = 1;
+			bullets = new float[128];
+			this->base = base;
+
+				int j = 0;
+				for(float i = 0; i < M_PI; i += 0.1, j++) {
+					bullets[j*4] = 50.0 + sinf(!reverse ? M_PI_2 + i : M_PI - i + M_PI_2) * 9;
+					bullets[j*4 + 1] = 80 + cosf(M_PI_2 + i) * 10;
+					bullets[j*4 + 2] = sinf(!reverse ? M_PI_2 + i : M_PI - i + M_PI_2) / 150.0;
+					bullets[j*4 + 3] = -0.01;
+				}
+		};
+		void update(unsigned int time, unsigned int step) {
+			if(num_bullets < 32 && base + num_bullets * 10 < time) {
+				num_bullets += time / 10 - num_bullets - base / 10;
+				if(num_bullets > 32) num_bullets = 32;
+			}
+			for(int i = 0; i < num_bullets; i++) {
+				bullets[i*4] += bullets[i*4 + 2] * step;
+				bullets[i*4 + 1] += bullets[i*4 + 3] * step;
+			}
+		}
+};
+
+class BulletPattern2 : public BulletPattern {
+	public:
+		BulletPattern2(unsigned int base) {
+			num_bullets = 0;
+			color_r = 0;
+			color_g = 1;
+			color_b = 0;
+			stride = sizeof(float);
+			bullets = new float[8*32*5];
+
+				int k = 0;
+				for(int j = 0; j < 8; j++) {
+					for(float i = 0; i < M_PI; i += 0.1, k++) {
+						bullets[k*5] = 50.0 + sinf(j % 2 ? M_PI_2 + i : M_PI - i + M_PI_2) * 9;
+						bullets[k*5 + 1] = 80 + cosf(M_PI_2 + i) * 10;
+						bullets[k*5 + 2] = sinf(j % 2 ? M_PI_2 + i : M_PI - i + M_PI_2) / 150.0;
+						bullets[k*5 + 3] = -0.01;
+						bullets[k*5 + 4] = base + j * 400 + i * 100;
+					}
+				}
+
+		};
+		void update(unsigned int time, unsigned int step) {
+			while(num_bullets < 256 && (unsigned int)(bullets[num_bullets*5 + 4]) < time) {
+				num_bullets++;
+			}
+			for(int i = 0; i < num_bullets; i++) {
+				bullets[i*5] += bullets[i*5 + 2] * step;
+				bullets[i*5 + 1] += bullets[i*5 + 3] * step;
+			}
+		}
+};
+
+
+Application::Application() {
+	// Initialize SDL
+	if(SDL_Init(SDL_INIT_VIDEO)) {
+		throw(std::runtime_error("SDL initialization failed"));
+	}
+	// Fetch the video info
+	const SDL_VideoInfo *info = SDL_GetVideoInfo();
+	if(!info) {
+		throw(std::runtime_error("SDL info query failed"));
+	}
+	// The SDL mode-flags
+	int flags = SDL_OPENGL;       // OpenGL in SDL
+	flags |= SDL_GL_DOUBLEBUFFER; // Double buffering
+	flags |= SDL_HWPALETTE;       // Hardware palette
+	// Check for hardware surface aviability
+	if(info->hw_available) {
+		flags |= SDL_HWSURFACE;
+	} else {
+		flags |= SDL_SWSURFACE;
+	}
+	// Check for hardware blit ability
+	if(info->blit_hw) {
+		flags |= SDL_HWACCEL;
+	}
+	// Setup double buffering
+	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+	
+	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
+	
+	// Get our surface
+	surface = SDL_SetVideoMode(1280, 720, 32, flags);
+	if(!surface) {
+		throw(std::runtime_error("Video mode set failed"));
+	}
+
+	// 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);
+	
+	glClearColor(0, 0, 0, 0);
+	glClearDepth(1);
+	
+	please_quit = false;
+}
+
+Application::~Application() {
+	
+}
+
+void Application::run() {
+	
+	elapsed = 0;
+	
+	font = new FTPixmapFont("VeraMono.ttf");
+	font->FaceSize(12);
+	texture = new TextureSDL("foo4.png");
+	shader = new GLShaderProgram();
+	
+	patterns.push_back(new BulletPattern());
+	for(int i = 0; i < 8; i++) {
+		patterns.push_back(new BulletPattern1(i % 2 == 1, 5000 + i * 400));
+	}
+	patterns.push_back(new BulletPattern2(9000));
+	
+	GLFragmentShader shader1("bullet_fragment.glsl");
+	GLVertexShader shader2("bullet_vertex.glsl");
+	shader->attach(shader1);
+	shader->attach(shader2);
+	shader->link();
+	
+	unsigned int lasttick = SDL_GetTicks();
+	
+	while(1) {
+		SDL_Event event;
+		SDL_PollEvent(&event);
+		if(event.type == SDL_QUIT) {
+			break;
+		} else if(event.type == SDL_KEYDOWN) {
+			event_keypress(event.key.keysym.sym);
+		}
+		if(please_quit) {
+			return;
+		}
+		
+		unsigned int tick = SDL_GetTicks();
+		unsigned int step = tick - lasttick;
+		lasttick = tick;
+		
+		main_loop(tick, step);
+		
+		SDL_Delay(10);
+	}
+}
+
+void Application::main_loop(unsigned int tick, unsigned int step) {
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	
+	glViewport(-10, -10, 660, 740);
+	glScissor(0, 0, 640, 720);
+	glEnable(GL_SCISSOR_TEST);
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	gluPerspective(45, (float)660 / (float)740, 1, 100);
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	
+	if(!paused) {
+		elapsed += step;
+		for(std::vector<BulletPattern*>::iterator it = patterns.begin(); it < patterns.end(); it++) {
+			(*it)->update(elapsed, step);
+		}
+	}
+	
+	float f = elapsed * 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(-10, 110, -10, 110, 0, 10);
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
+	shader->use();
+	glPointSize(16.0);
+	glEnable(GL_TEXTURE_2D);
+	glBindTexture(GL_TEXTURE_2D, texture->tex());
+	
+	glColor4f(1, 0, 0, 1);
+	
+	for(std::vector<BulletPattern*>::iterator it = patterns.begin(); it < patterns.end(); it++) {
+		BulletPattern *bp = (*it);
+		glColor3f(bp->color_r, bp->color_g, bp->color_b);
+		bp->draw();
+	}
+	
+	glDisable(GL_TEXTURE_2D);
+	glUseProgram(0);
+	
+	glDisable(GL_SCISSOR_TEST);
+	glViewport(640, 0, 640, 720);
+	
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(0, 100, 0, 100, 0, 10);
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	
+	glColor4f(1, 1, 1, 1);
+
+	char s[0xff];
+
+	if(tick - lastframes >= 1000) {
+		fps = (float)frames * ((float)(tick - lastframes) / 1000.0f);
+		frames = 1;
+		lastframes = tick;
+	} else {
+		frames++;
+	}
+	snprintf(s, 0xff, "FPS: %.2f", fps);
+	glRasterPos2f(1, 1);
+	font->Render(s);
+	
+	SDL_GL_SwapBuffers();
+}
+
+void Application::quit() {
+	please_quit = true;
+}
+
+void Application::event_keypress(SDLKey key) {
+	switch(key) {
+		case SDLK_ESCAPE:
+			quit();
+			break;
+		default:
+			break;
+	}
+}