OpenGL

OPenGL - Sample drawing

Chú ý:
Định nghĩa 2 cấu trúc Vertex3D và Triangle3D (nên đn trong 1 file .h rồi import vào) :
* Created by VUONGTM on 7/16/10.
* Copyright 2010 EXARTISAN. All rights reserved.
*This is my definition
*/

/*
*Vertex3D
**/
typedef struct {
GLfloat x;
GLfloat y;
GLfloat z;
} Vertex3D;

/*
* Make vertex
**/
static inline Vertex3D Vertex3DMake(CGFloat inX, CGFloat inY, CGFloat inZ)
{
Vertex3D ret;
ret.x = inX;
ret.y = inY;
ret.z = inZ;
return ret;
}

/*
*Canculate distance between two vertex
**/
static inline GLfloat Vertex3DCalculateDistanceBetweenVertices (Vertex3D first, Vertex3D second)
{
GLfloat deltaX = second.x - first.x;
GLfloat deltaY = second.y - first.y;
GLfloat deltaZ = second.z - first.z;
return sqrtf(deltaX*deltaX + deltaY*deltaY + deltaZ*deltaZ );
};


/*
*Triangle3D
**/
typedef struct {
Vertex3D v1;
Vertex3D v2;
Vertex3D v3;
} Triangle3D;

static inline Triangle3D Triangle3DMake(Vertex3D v1, Vertex3D v2, Vertex3D v3)
{
Triangle3D trigalge3d;
trigalge3d.v1 = v1;
trigalge3d.v2 = v2;
trigalge3d.v3 = v3;
return trigalge3d;
}