OmegaEngine/skybox.cpp at master · i12popea/OmegaEngine · GitHub

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#include "skybox.hpp"

using namespace std;
using namespace ed;

void Skybox(vector<int> _skybox, float size)
{
	glPushMatrix();

	glRotatef(180, 1, 0, 0);

//	float size = 200.0f;
        glEnable(GL_TEXTURE_2D);        //and turn on texturing
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
        glBindTexture(GL_TEXTURE_2D, _skybox[1]);  //use the texture we want
        glBegin(GL_QUADS);      //and draw a face
                //back face
                glTexCoord2f(0,0);      //use the correct texture coordinate
                glVertex3f(size/2,size/2,size/2);       //and a vertex
                glTexCoord2f(1,0);      //and repeat it...
                glVertex3f(-size/2,size/2,size/2);
                glTexCoord2f(1,1);
                glVertex3f(-size/2,-size/2,size/2);
                glTexCoord2f(0,1);
                glVertex3f(size/2,-size/2,size/2);
        glEnd();
        glBindTexture(GL_TEXTURE_2D, _skybox[0]);
        glBegin(GL_QUADS);
                //left face
                glTexCoord2f(0,0);
                glVertex3f(-size/2,size/2,size/2);
                glTexCoord2f(1,0);
                glVertex3f(-size/2,size/2,-size/2);
                glTexCoord2f(1,1);
                glVertex3f(-size/2,-size/2,-size/2);
                glTexCoord2f(0,1);
                glVertex3f(-size/2,-size/2,size/2);
        glEnd();
        glBindTexture(GL_TEXTURE_2D, _skybox[3]);
        glBegin(GL_QUADS);
                //front face
                glTexCoord2f(1,0);
                glVertex3f(size/2,size/2,-size/2);
                glTexCoord2f(0,0);
                glVertex3f(-size/2,size/2,-size/2);
                glTexCoord2f(0,1);
                glVertex3f(-size/2,-size/2,-size/2);
                glTexCoord2f(1,1);
                glVertex3f(size/2,-size/2,-size/2);
        glEnd();
        glBindTexture(GL_TEXTURE_2D, _skybox[2]);
        glBegin(GL_QUADS);
                //right face
                glTexCoord2f(0,0);
                glVertex3f(size/2,size/2,-size/2);
                glTexCoord2f(1,0);
                glVertex3f(size/2,size/2,size/2);
                glTexCoord2f(1,1);
                glVertex3f(size/2,-size/2,size/2);
                glTexCoord2f(0,1);
                glVertex3f(size/2,-size/2,-size/2);
        glEnd();
        glBindTexture(GL_TEXTURE_2D, _skybox[5]);
        glBegin(GL_QUADS);                      //top face
                glTexCoord2f(1,0);
                glVertex3f(size/2,size/2,size/2);
                glTexCoord2f(0,0);
                glVertex3f(-size/2,size/2,size/2);
                glTexCoord2f(0,1);
                glVertex3f(-size/2,size/2,-size/2);
                glTexCoord2f(1,1);
                glVertex3f(size/2,size/2,-size/2);
        glEnd();
        glBindTexture(GL_TEXTURE_2D, _skybox[4]);
        glBegin(GL_QUADS);
                //bottom face
                glTexCoord2f(1,1);
                glVertex3f(size/2,-size/2,size/2);
                glTexCoord2f(0,1);
                glVertex3f(-size/2,-size/2,size/2);
                glTexCoord2f(0,0);
                glVertex3f(-size/2,-size/2,-size/2);
                glTexCoord2f(1,0);
                glVertex3f(size/2,-size/2,-size/2);
        glEnd();
        glDisable(GL_TEXTURE_2D);
	glPopMatrix();
}