#include "3dStructs.h"
#include <GL/glut.h>

/* Debugging*/
#include <iostream.h>


void C3dModel::Draw(int g_ViewMode)
{
   /* This function draws the models, currently not all functions 
      supported */   

	for(int i = 0; i < numOfObjects; i++)
	{
		// Make sure we have valid objects just in case. (size() is in the vector class)
		if(pObject.size() <= 0) break;

		// Get the current object that we are displaying
			
		// Check to see if this object has a texture map, if so bind the texture to it.
		if(pObject[i].bHasTexture) {

			// Turn on texture mapping and turn off color
			glEnable(GL_TEXTURE_2D);

			// Reset the color to normal again
			glColor3ub(255, 255, 255);

			// Bind the texture map to the object by it's materialID
			//glBindTexture(GL_TEXTURE_2D, g_Texture[pObject->materialID]);
		} else {

			// Turn off texture mapping and turn on color
			glDisable(GL_TEXTURE_2D);

			// Reset the color to normal again
			glColor3ub(255, 255, 255);
		}

		// This determines if we are in wireframe or normal mode
		glBegin(g_ViewMode);					// Begin drawing with our selected mode (triangles or lines)

			// Go through all of the faces (polygons) of the object and draw them
			for(int j = 0; j < pObject[i].iNumOfFaces; j++)
			{
				// Go through each corner of the triangle and draw it.
				for(int whichVertex = 0; whichVertex < 3; whichVertex++)
				{
					// Get the index for each point of the face
					int index = pObject[i].pFaces[j].vertIndex[whichVertex];
			
					// Give OpenGL the normal for this vertex.
					glNormal3f(pObject[i].pNormals[ index ].x, pObject[i].pNormals[ index ].y, pObject[i].pNormals[ index ].z);
				
					// If the object has a texture associated with it, give it a texture coordinate.
					if(pObject[i].bHasTexture) {

						// Make sure there was a UVW map applied to the object or else it won't have tex coords.
						if(pObject[i].pTexVerts) {
							glTexCoord2f(pObject[i].pTexVerts[ index ].x, pObject[i].pTexVerts[ index ].y);
						}
					} else {

						// Make sure there is a valid material/color assigned to this object.
						// You should always at least assign a material color to an object, 
						// but just in case we want to check the size of the material list.
						// if the size is at least one, and the material ID != -1,
						// then we have a valid material.
						if(pMaterials.size() && pObject[i].materialID >= 0) 
						{
							// Get and set the color that the object is, since it must not have a texture
							BYTE *pColor = pMaterials[pObject[i].materialID].color;

							// Assign the current color to this model
							glColor3ub(pColor[0], pColor[1], pColor[2]);
						}
					}

					// Pass in the current vertex of the object (Corner of current face)
					glVertex3f(pObject[i].pVerts[ index ].x, pObject[i].pVerts[ index ].y, pObject[i].pVerts[ index ].z);
				}
			}

		glEnd();								// End the drawing
	}
}

/* Just a debugging function */
void C3dModel::PrintProperties()
{
   printf( "Number of objects: %i\n", numOfObjects);
   printf( "Number of materials: %i\n", numOfMaterials);
   for( int i; i < numOfObjects; i++ )
   {
      printf( "Object Number %i:\n", i );   
      printf( "Number of Vertices: %i\n", pObject[i].iNumOfVerts);
      printf( "Number of Faces: %i\n", pObject[i].iNumOfFaces);
      printf( "Number of Texture Materials: %i\n", pObject[i].iNumTexVertex);
      printf( "Has a texture: %i\n", pObject[i].bHasTexture);   
   }
}