Function TextureMapDraw

Samples/NiViewer/Draw.cpp:271–307

}

void TextureMapDraw(XnTextureMap* pTex, IntRect* pLocation)
{
	// set current texture object
	glBindTexture(GL_TEXTURE_2D, pTex->nID);

	// turn on texture mapping
	glEnable(GL_TEXTURE_2D);

	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	// set drawing mode to rectangles
	glBegin(GL_QUADS);

	// set the color of the polygon
	glColor4f(1, 1, 1, 1);

	// upper left
	glTexCoord2f(0, 0);
	glVertex2f(pLocation->uLeft, pLocation->uBottom);
	// upper right
	glTexCoord2f((float)pTex->OrigSize.X/(float)pTex->Size.X, 0);
	glVertex2f(pLocation->uRight, pLocation->uBottom);
	// bottom right
	glTexCoord2f((float)pTex->OrigSize.X/(float)pTex->Size.X, (float)pTex->OrigSize.Y/(float)pTex->Size.Y);
	glVertex2f(pLocation->uRight, pLocation->uTop);
	// bottom left
	glTexCoord2f(0, (float)pTex->OrigSize.Y/(float)pTex->Size.Y);
	glVertex2f(pLocation->uLeft, pLocation->uTop);

	glEnd();

	// turn off texture mapping
	glDisable(GL_TEXTURE_2D);

	glDisable(GL_BLEND);
}

// --------------------------------
// Code