md2model.h

/* Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above notice and this permission notice shall be included in all copies
 * or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
/* File for "Animation" lesson of the OpenGL tutorial on
 * www.videotutorialsrock.com
 */



#ifndef MD2_MODEL_H_INCLUDED
#define MD2_MODEL_H_INCLUDED

#ifdef __APPLE__
#include <OpenGL/OpenGL.h>
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif

#include "vec3f.h"

struct MD2Vertex {
	Vec3f pos;
	Vec3f normal;
};

struct MD2Frame {
	char name[16];
	MD2Vertex* vertices;
};

struct MD2TexCoord {
	float texCoordX;
	float texCoordY;
};

struct MD2Triangle {
	int vertices[3];  //The indices of the vertices in this triangle
	int texCoords[3]; //The indices of the texture coordinates of the triangle
};

class MD2Model {
	private:
		MD2Frame* frames;
		int numFrames;
		MD2TexCoord* texCoords;
		MD2Triangle* triangles;
		int numTriangles;
		GLuint textureId;
		
		int startFrame; //The first frame of the current animation
		int endFrame;   //The last frame of the current animation
		
		/* The position in the current animation.  0 indicates the beginning of
		 * the animation, which is at the starting frame, and 1 indicates the
		 * end of the animation, which is right when the starting frame is
		 * reached again.  It always lies between 0 and 1.
		 */
		float time;
		
		MD2Model();
	public:
		~MD2Model();
		
		//Switches to the given animation
		void setAnimation(const char* name);
		//Advances the position in the current animation.  The entire animation
		//lasts one unit of time.
		void advance(float dt);
		//Draws the current state of the animated model.
		void draw();
		
		//Loads an MD2Model from the specified file.  Returns NULL if there was
		//an error loading it.
		static MD2Model* load(const char* filename);
};










#endif