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Viewing changes to src/utils.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Lionel Le Folgoc (mr_pouit)
  • Date: 2006-07-15 15:45:57 UTC
  • Revision ID: james.westby@ubuntu.com-20060715154557-3paxq02hx4od0wm4
Tags: upstream-0.2.0
Import upstream version 0.2.0

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src/utils.cpp
 
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/***************************************************************************
 
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 *   Copyright (C) 2006 by Frederic MARTIN                                 *
 
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 *   martin-frederic@users.sourceforge.net                                 *
 
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 *                                                                         *
 
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 *   This program is free software; you can redistribute it and/or modify  *
 
6
 *   it under the terms of the GNU General Public License as published by  *
 
7
 *   the Free Software Foundation; either version 2 of the License, or     *
 
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 *   (at your option) any later version.                                   *
 
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 *                                                                         *
 
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 *   This program is distributed in the hope that it will be useful,       *
 
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 
12
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 
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 *   GNU General Public License for more details.                          *
 
14
 *                                                                         *
 
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 *   You should have received a copy of the GNU General Public License     *
 
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 *   along with this program; if not, write to the                         *
 
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 *   Free Software Foundation, Inc.,                                       *
 
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 
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 ***************************************************************************/
 
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#include "utils.h"
 
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/**************************************************************************************/
 
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void go_2D()
 
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{
 
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        glMatrixMode(GL_PROJECTION);
 
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        glPushMatrix();
 
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        glLoadIdentity();
 
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        glOrtho( 0.0f, 1024.0f, 768.0f, 0.0f, 0.0f, 1.0f );
 
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        glMatrixMode(GL_MODELVIEW);
 
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        glPushMatrix();
 
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        glLoadIdentity();
 
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        glDisable(GL_LIGHTING);
 
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}
 
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/**************************************************************************************/
 
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void exit_2D()
 
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{
 
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        glMatrixMode(GL_PROJECTION);
 
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        glPopMatrix();
 
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        glMatrixMode(GL_MODELVIEW);
 
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        glPopMatrix();
 
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        glEnable(GL_LIGHTING);
 
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}
 
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/**************************************************************************************/
 
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void draw_rectangle(int X, int Y,int width,int height)
 
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{
 
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        glBegin(GL_LINE_LOOP);
 
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                glVertex2i(X, Y);
 
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                glVertex2i(X, Y+height);
 
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                glVertex2i(X+width,Y+height);
 
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                glVertex2i(X+width,Y);
 
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                glVertex2i(X, Y);
 
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        glEnd();
 
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}
 
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/**************************************************************************************/
 
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void draw_rectangle_2(int x1, int y1,int x2,int y2)
 
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{
 
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        glBegin(GL_LINE_LOOP);
 
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                glVertex2i(x1, y1);
 
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                glVertex2i(x1, y2);
 
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                glVertex2i(x2, y2);
 
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                glVertex2i(x2, y1);
 
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                glVertex2i(x1, y1);
 
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        glEnd();
 
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}
 
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/**************************************************************************************/
 
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void draw_filled_rectangle(int x1, int y1,int x2,int y2)
 
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{
 
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        glBegin(GL_QUADS);
 
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                glVertex2i(x1, y1);
 
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                glVertex2i(x1, y2);
 
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                glVertex2i(x2, y2);
 
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                glVertex2i(x2, y1);
 
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        glEnd();
 
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}
 
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/**************************************************************************************/
 
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void draw_image(int X, int Y,int width,int height,CBasicTexture* image)
 
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{
 
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        glEnable(GL_TEXTURE_2D);
 
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        image->bind();
 
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        glBegin(GL_QUADS);
 
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                glTexCoord2f(0.0f, 0.0f);               glVertex2i(X, Y);
 
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                glTexCoord2f(0.0f, 1.0f);               glVertex2i(X, Y+height);
 
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                glTexCoord2f(1.0f, 1.0f);               glVertex2i(X+width,Y+height);
 
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                glTexCoord2f(1.0f, 0.0f);               glVertex2i(X+width,Y);
 
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        glEnd();
 
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        glDisable(GL_TEXTURE_2D);
 
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}
 
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/**************************************************************************************/
 
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void clearScreen()
 
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{
 
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        glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
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        SDL_GL_SwapBuffers();
 
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}
 
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/**************************************************************************************/
 
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/**************************************************************************************/
 
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GLfloat alpha_fade;
 
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void init_fade_in()
 
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{
 
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        alpha_fade=0.0f;
 
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}
 
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void init_fade_out()
 
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{
 
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        alpha_fade=1.0f;
 
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}
 
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/**************************************************************************************/
 
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bool gl_fade_in(GLfloat speed)
 
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{
 
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        if (alpha_fade<1.0f)
 
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                alpha_fade+=speed;
 
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        else
 
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        {
 
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                alpha_fade=0.0f;
 
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                return false;
 
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        }
 
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        glColor4f(0.0f,0.0f,0.0f,alpha_fade);
 
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        glBegin(GL_QUADS);
 
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                glVertex2i(0, 0);
 
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                glVertex2i(0, 768);
 
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                glVertex2i(1024, 768);
 
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                glVertex2i(1024, 0);
 
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        glEnd();
 
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        return true;
 
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}
 
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/**************************************************************************************/
 
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bool gl_fade_out(GLfloat speed)
 
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{
 
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        if (alpha_fade>0.0f)
 
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                alpha_fade-=speed;
 
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        else
 
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        {
 
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                alpha_fade=0.0f;
 
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                return false;
 
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        }
 
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        glColor4f(0.0f,0.0f,0.0f,alpha_fade);
 
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        glBegin(GL_QUADS);
 
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                glVertex2i(0, 0);
 
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                glVertex2i(0, 768);
 
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                glVertex2i(1024, 768);
 
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                glVertex2i(1024, 0);
 
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        glEnd();
 
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        return true;    
 
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}
 
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/**************************************************************************************/
 
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/**************************************************************************************/
 
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