Matrix 类示例

hyzboy · 发表于 2009-2-16 11:42:00

http://picasaweb.google.com/lh/p ... sbQ?feat=directlink

#include<hgl/win.h>
#include<hgl/OpenGL.H>
#include<hgl/FlowObject.H>
#include<hgl/Matrix.H>
#include<hgl/TileFont.H>
const float corners[]= //立方体的8个点原始坐标
{
-25.0f, 25.0f, 25.0f,
25.0f, 25.0f, 25.0f,
25.0f,-25.0f, 25.0f,
-25.0f,-25.0f, 25.0f,
-25.0f, 25.0f,-25.0f,
25.0f, 25.0f,-25.0f,
25.0f,-25.0f,-25.0f,
-25.0f,-25.0f,-25.0f
};
enum WORK_MODE //工作模式枚举
{
wmMove=0, //移动
wmScale, //缩放
wmRotate //旋转
};
wchar_t *WORK_NAME[]=
{
L"Move",
L"Scale",
L"Rotate"
};
using namespace hgl;
class TestObject:public FlowObject
{
TileFont *fnt;
Matrix m; //定义一个变换矩阵
Vertex3f move,scale,rotate;
Vertex3f coord[8];
int index[24];
WORK_MODE mode;
wchar_t axis;
bool use_hard;
/* 4 5
*---------------*
/| /|
0 / | 1 / |
*--+------------* |
| | | |
| | | | 6
| *------------+--*
| / 7 | /
|/ |/
*---------------*
3 2
*/
private:
void DrawBox()
{
int *p=index;
for(int i=0;i<6;i++)
{
glBegin(GL_LINE_LOOP);
for(int j=0;j<4;j++)
glVertex3fv(coord[*p++]);
glEnd();
}
}
bool KeyDownProc(uint key)
{
switch(key)
{
case kbM:
case kbT: mode =wmMove;break; // T/M 进入移动模式
case kbS: mode =wmScale;break; // S 进入缩放模式
case kbR: mode =wmRotate;break; // R 进入旋转模式
case kbX: axis ='X';break; // X 处理X轴
case kbY: axis ='Y';break; // Y 处理Y轴
case kbZ: axis ='Z';break; // Z 处理Z轴
case kbSpace:
case kbEnter: move.Zero(); // 空格/回车数据复位
scale.One();
rotate.Zero();
break;
case kbH: use_hard=!use_hard;break; // 是否使用硬件处理
default: return(false);
}
return(true);
}
bool KeyPressProc(uint key)
{
float value=0;
if(key==kbMinus )value=-1;else // - 减少量
if(key==kbEquals)value= 1;else // + 增加量
return(false);
float *p;
if(mode==wmMove )p=move;else
if(mode==wmScale ){value/=10.0f;p=scale;}else
if(mode==wmRotate )p=rotate;else
return(false);
if(axis=='X')*(p+0)+=value;else
if(axis=='Y')*(p+1)+=value;else
if(axis=='Z')*(p+2)+=value;else
return(false);
return(true);
}
public:
TestObject()
{
const int indexes[]=
{
0,1,2,3,
4,5,1,0,
3,2,6,7,
5,4,7,6,
1,5,6,2,
4,0,3,7
};
memcpy(index,indexes,sizeof(indexes));
#ifdef __BORLANDC__
OnKeyDown =KeyDownProc; //设置按键按下处理
OnKeyPress=KeyPressProc; //设置按键超时处理
#else
SetEventCall(OnKeyDown, this,TestObject::KeyDownProc); //设置按键按下处理
SetEventCall(OnKeyPress,this,TestObject::KeyPressProc); //设置按键超时处理
#endif//
fnt=GetFont(); //取得默认字体
move.Zero();
scale.One();
rotate.Zero();
mode=wmMove;
axis='X';
OpenLineSmooth(); //开启线条平滑
}
void Draw()
{
ClearScreen();
To3DMode();
glTranslatef(0,0,-200);
CloseTexture();
OpenBlend(GL_SRC_ALPHA,GL_ONE);
glColor(1,1,1,1);
{
memcpy(coord,corners,sizeof(corners)); //恢复立方体坐标原始数据
m.LoadIdentity(); //恢复缺省矩阵
m.Translate(move.x,move.y,move.z); //设置移动
m.Scale(scale.x,scale.y,scale.z); //设置缩放
m.Rotate(rotate.x,1,0,0); //设置绕X轴旋转
m.Rotate(rotate.y,0,1,0); //设置绕Y轴旋转
m.Rotate(rotate.z,0,0,1); //设置绕Z轴旋转
if(use_hard)
{
//使用硬件处理矩阵
glMultMatrixf(m); //改变当前OpenGL矩阵
}
else
{
//软件处理矩阵
for(int i=0;i<8;i++)
coord[i]*=m; //将所有坐标乘上变换矩阵
}
DrawBox(); //绘制box
}
//输出信息到屏幕
To2DMode();
int row=0;
int gap=14;
fnt->DrawFormat(0,row,L"Move : %6.2f,%6.2f,%6.2f",move.x, move.y, move.z); row+=gap;
fnt->DrawFormat(0,row,L"Scale : %6.2f,%6.2f,%6.2f",scale.x, scale.y, scale.z); row+=gap;
fnt->DrawFormat(0,row,L"Rotate: %6.2f,%6.2f,%6.2f",rotate.x,rotate.y, rotate.z); row+=gap;
row+=gap;
fnt->DrawFormat(0,row,L"Matrix * Vertex : %s",use_hard?L"OpenGL Hardware":L"Software");row+=gap;
fnt->DrawFormat(0,row,L"Work Mode: %s",WORK_NAME[mode]);row+=gap;
fnt->DrawFormat(0,row,L"Work Asix: %c",axis); row+=gap;
row+=gap;
for(int i=0;i<4;i++)
{
float *p=m.m+i*4;
fnt->DrawFormat(0,row,L"Matrix[%d]=%6.2f,%6.2f,%6.2f,%6.2f",i,p[0],p[1],p[2],p[3]);
row+=gap;
}
row+=gap;
for(int i=0;i<8;i++)
{
fnt->DrawFormat(0,row,L"Coord[i]=%6.2f,%6.2f,%6.2f",coord[i].x,coord[i].y,coord[i].z);
row+=gap;
}
}
};
void GameMain(int,wchar_t **)
{
SystemInitInfo sii;
sii.info.ProjectName=L"矩阵类测试";
sii.info.ProjectCode=L"Matrix Test";
if(!Init(&sii))return; //初始化引擎
SetStart(new TestObject); //设置起始对象
RunApplication(); //开始运行程序
}

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