I’m having a problem with my texture loader. I have a sphere and I bind a texture, the texture appears, but it is upside down. I don’t know what to do to remedy this problem. Please Help. I have attached a code that has texture loader and sphere.
//Java classes
import java.awt.;
import java.awt.event.;
// GL4Java classes
import gl4java.GLContext;
import gl4java.swing.GLAnimJPanel;
import gl4java.utils.glut.;
import gl4java.utils.textures.;
public class gl4java_3Dcode extends GLAnimJPanel{
GLUTFunc glut;
int texture[] = new int[1];
double earth_radius = 6378.2;
double camera_distance = 10000.0;
public gl4java_3Dcode() {
super(false);
}
public void init(){
glut = new GLUTFuncLightImpl(gl,glu);
if(!LoadGLTextures())
{
System.out.println("Failed to load Textures");
System.exit(0);
}
float width = (float)getSize().width;
float height = (float)getSize().height;
gl.glEnable(GL_TEXTURE_2D); //Enable Texture Mapping
gl.glShadeModel(GL_SMOOTH); //Enable Smooth Color Shading
gl.glClearColor(0.0f,0.0f,0.0f,0.0f); //Clears the Background to black
gl.glClearDepth(1.0); //Clears the Depth Buffer
gl.glEnable(GL_DEPTH_TEST); // Enables Depth Testing
gl.glDepthFunc(GL_LEQUAL); //Type of Depth test to do
gl.glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); //Nice Perspective Calculations
}
public void reshape(int width, int height){
if (height ==0) height =1;
gl.glViewport(0,0,width,height); //Reset current Viewport and Perspective Transformation
gl.glMatrixMode(GL_PROJECTION); //Select the Projection Matrix
gl.glLoadIdentity(); //Reset Projection Matrix
glu.gluPerspective(60.0f,width/height,1.0f,75000.0f); //Calculate the Aspect Ratio of Window
gl.glMatrixMode(GL_MODELVIEW); //Select the Modelview Matrix
gl.glLoadIdentity(); //Reset the Modelview Matrix
}
public void display(){
glj.gljMakeCurrent(); //Make Sure GL is initiated properly
solidSphere();
//wireSphere();
//new gl4java_gcitrajectory(gl);
gl.glFlush();
}
//------------------------------------------------------------------------------
// Method to create the GLTextures
//------------------------------------------------------------------------------
public boolean LoadGLTextures(){
//PngTextureLoader texLoader = new PngTextureLoader(gl, glu); //Call to load a .png image file
AWTTextureLoader texLoader = new AWTTextureLoader(this,gl,glu); //Call to load a .jpg image file
texLoader.readTexture(“C:/Documents and Settings/mbutler.GEN-X/jbproject/GCI_PLOT/src/gci_plot/earth.jpg”);
if(texLoader.isOk())
{
//Create the texture
gl.glGenTextures(1,texture);
gl.glBindTexture(GL_TEXTURE_2D, texture[0]);
gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl.glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP); // Set Up Sphere Mapping
gl.glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
gl.glEnable(GL_BLEND);
gl.glEnable(GL_TEXTURE_GEN_S); // Enable Sphere Mapping
gl.glEnable(GL_TEXTURE_GEN_T);
gl.glTexImage2D(GL_TEXTURE_2D,0,3,texLoader.getImageWidth(),texLoader.getImageHeight(),0,GL_RGB,GL_UNSIGNED_BYTE,texLoader.getTexture());
return true;
}
return false;
}
//------------------------------------------------------------------------------
// void solidSphere() Method that defines solid sphere
//------------------------------------------------------------------------------
public void solidSphere(){
gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //Clear screen and buffer bit
gl.glLoadIdentity(); //Reset the view
gl.glTranslatef(0.0f,0.0f,-35000.0f);
gl.glBindTexture(GL_TEXTURE_2D, texture[0]);
glut.glutSolidSphere(earth_radius,12000,12000);
}
