Hi,
I'm trying to modify Lesson 6 to make it use the
Corona library for the image loading part.
The problem here is that currently it looks like
this... which is obviously not okay, but I have no idea what causes it.
Is it me doing something wrong, or is it because Corona "sorts" the image differently in memory, or maybe something else entirely?
Here's the code for the loader and the draw function (the latter is mostly a pure C&P though, but I'll post it here anyway just in case):
BOOL GLDrawObject::LoadTexture(char* pFilename, int iTexNo)
{
if (iTexNo>(TEX_Q-1))
{ MessageBox (HWND_DESKTOP, "Texture index out of range", "FAIL", MB_OK | MB_ICONEXCLAMATION);
return FALSE; }
corona::Image* Image = corona::OpenImage(pFilename, corona::FF_AUTODETECT);
if (!Image)
{ MessageBox (HWND_DESKTOP, "Error loading texture", "FAIL", MB_OK | MB_ICONEXCLAMATION);
return FALSE; }
m_stTexArray[iTexNo].iWidth = Image->getWidth();
m_stTexArray[iTexNo].iHeight = Image->getHeight();
m_stTexArray[iTexNo].sImageData = (GLubyte*)Image->getPixels();
glGenTextures(1, &m_stTexArray[iTexNo].iTexID);
glBindTexture(GL_TEXTURE_2D, m_stTexArray[iTexNo].iTexID);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, 3, m_stTexArray[iTexNo].iWidth, m_stTexArray[iTexNo].iHeight,
0, GL_RGB, GL_UNSIGNED_BYTE, m_stTexArray[iTexNo].sImageData);
delete Image;
return TRUE;
}
void GLDrawObject::Draw(void)
{ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
glLoadIdentity(); // Reset The View
glTranslatef(0.0f,0.0f,-5.0f); // Move Into The Screen 5 Units
glRotatef(m_fXrot,1.0f,0.0f,0.0f); // Rotate On The X Axis
glRotatef(m_fYrot,0.0f,1.0f,0.0f); // Rotate On The Y Axis
glRotatef(m_fZrot,0.0f,0.0f,1.0f); // Rotate On The Z Axis
glBindTexture(GL_TEXTURE_2D, m_stTexArray[m_iTexNo].iTexID); // Select Our Texture
glBegin(GL_QUADS);
// Front Face
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top Right Of The Texture and Quad
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad
// 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();
}
