add texture to cube3D

In this example we add texture to cube3D using OPENGL, read image and add it to cube surface. glTexParameteri function is used to configure the texture. GLuint texture variable is used to hold the texture data. The cube is rotating about x,y,z axises. Image of type BMP is loaded and mapped into to the texture pixels.The texture coordinates are linked to the polygon vertices.
cpp code

#include <stdlib.h>
#include <GL/glut.h>
#include "RgbImage.h"
GLfloat xRotated, yRotated, zRotated;
GLuint	texture[1];			// Storage For One Texture ( NEW )
/*
* Read a texture map from a BMP bitmap file.
*/
void loadTextureFromFile(char *filename)
{   
   glClearColor (0.0, 0.0, 0.0, 0.0);
   glShadeModel(GL_FLAT);
   glEnable(GL_DEPTH_TEST);

   RgbImage theTexMap( filename );

   // Pixel alignment: each row is word aligned (aligned to a 4 byte boundary)
   //    Therefore, no need to call glPixelStore( GL_UNPACK_ALIGNMENT, ... );

  
	glGenTextures(1, &texture[0]);					// Create The Texture
		glBindTexture(GL_TEXTURE_2D, texture[0]);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

		// Typical Texture Generation Using Data From The Bitmap
	
		glTexImage2D(GL_TEXTURE_2D, 0, 3, theTexMap.GetNumCols(), theTexMap.GetNumRows(), 0, GL_RGB, GL_UNSIGNED_BYTE, theTexMap.ImageData() );
 


 

}

/*
* Draw the texture in the OpenGL graphics window
*/
void drawScene(void)
{
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glEnable(GL_TEXTURE_2D);
  	glBindTexture(GL_TEXTURE_2D, texture[0]);
   glLoadIdentity();
   glTranslatef(0.0,0.0,-5);
     glRotatef(yRotated, 0, 1, 0);
	 glRotatef(zRotated, 0, 0, 1);

  glBegin(GL_QUADS);
		// Front Face
		glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);
		// Back Face
		glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);
		glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
		// Top Face
		glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);
		glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,  1.0f,  1.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);
		// Bottom Face
		glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
		glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
		// Right face
		glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
		glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);
		// Left Face
		glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);
	glEnd();

   glFlush();
   glDisable(GL_TEXTURE_2D);
  
}

void resizeWindow(int x, int y)
{
 if (y == 0 || x == 0) return;  //Nothing is visible then, so return
    //Set a new projection matrix
    glMatrixMode(GL_PROJECTION);  
    glLoadIdentity();
    //Angle of view:40 degrees
    //Near clipping plane distance: 0.5
    //Far clipping plane distance: 20.0
     
    gluPerspective(40.0,(GLdouble)x/(GLdouble)y,0.5,20.0);
    glMatrixMode(GL_MODELVIEW);
    glViewport(0,0,x,y);  //Use the whole window for rendering
}

void keyboard (unsigned char key, int x, int y)
{
   switch (key) {
      case 27:
         exit(0);
         break;
      default:
         break;
   }
}

char* filename = "./salt_on_spoon.bmp";
void idleFunc(void)
{
 
     yRotated += 0.01;
     zRotated += 0.01;
    drawScene();
}
int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
   glutInitWindowSize(240, 240);
   glutInitWindowPosition(100, 100);
   glutCreateWindow(argv[0]);

   loadTextureFromFile( filename );
   
   glutDisplayFunc(drawScene);
   glutReshapeFunc(resizeWindow);
   glutKeyboardFunc(keyboard);
     glutIdleFunc(idleFunc);
   glutMainLoop();
   return 0;
}

Attachments

ouput

texture-cube3D.png (52.18 KiB) Viewed 12641 times

TextureMapping5 -1.zip

full package VC2008

(39.62 KiB) Downloaded 2454 times