85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/*---------------------------------------------------------------------------------
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KubKraft
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Copyright (C) 2013 Quentin Bazin <quent42340@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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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
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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, see <http://www.gnu.org/licenses/>.
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---------------------------------------------------------------------------------*/
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#include <iostream>
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#include <SDL/SDL.h>
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include "init.h"
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#include "config.h"
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void initSDL() {
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// Start SDL with video module
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if(SDL_Init(SDL_INIT_VIDEO) < 0) {
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fprintf(stderr, "Error while initializing SDL: %s\n", SDL_GetError());
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exit(EXIT_FAILURE);
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}
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// Creation of the window initialized to work with OpenGL
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SDL_Surface *screen = SDL_SetVideoMode(WIN_WIDTH, WIN_HEIGHT, 32, SDL_OPENGL);
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if(screen == 0) {
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fprintf(stderr, "Error while initializing display: %s\n", SDL_GetError());
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exit(EXIT_FAILURE);
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}
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// Label of application
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SDL_WM_SetCaption(APP_LABEL, NULL);
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}
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void initOpenGL() {
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE); // Turn on hidden face tagging
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glCullFace(GL_BACK); // Hidden faces = back faces
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glFrontFace(GL_CCW); // Front face = Trigo way
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glAlphaFunc(GL_GREATER, 0.9);
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glEnable(GL_ALPHA_TEST);
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glFogi(GL_FOG_MODE, GL_LINEAR);
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glFogf(GL_FOG_START, DIST_FAR - (4 * (CHUNK_WIDTH + CHUNK_DEPTH) / 2));
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glFogf(GL_FOG_END, DIST_FAR);
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glHint(GL_FOG_HINT, GL_DONT_CARE);
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GLfloat fog_c[] = {0.5f, 0.5f, 0.5f, 1.0f};
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glFogfv(GL_FOG_COLOR, fog_c);
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glEnable(GL_FOG);
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// Clean screen RGBa color
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glClearColor(0.5, 0.5, 1.0, 0);
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// Window definition
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glViewport(0, 0, WIN_WIDTH, WIN_HEIGHT);
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glRasterPos2f(0, 0);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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// Visible area definition
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gluPerspective(WIN_FOV, (GLdouble)WIN_WIDTH / (GLdouble)WIN_HEIGHT, DIST_NEAR, DIST_FAR - (2 * (CHUNK_WIDTH + CHUNK_DEPTH) / 2));
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glEnable(GL_TEXTURE_2D);
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std::cout << glGetString(GL_VERSION) << std::endl;
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}
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