void GetUserInput(void)
{
g_fFrame_Time = g_Timer.Stop();
g_Timer.Restart();
GutReadKeyboard();
g_Control.Update(g_fFrame_Time, CGutUserControl::CONTROLLER_ROTATEOBJECT);
}
void GetUserInput(void)
{
// 讀取滑鼠
GutMouseInfo mouse;
if ( GutReadMouse(&mouse) )
{
// 取得畫完前一個畫面到現在所經歷的時間
g_fFrame_Time = g_Timer.Stop();
g_Timer.Restart();
float moving_speed = 2.0f * g_fFrame_Time;
float rotation_speed = 1.0 * g_fFrame_Time;
// 如果按下滑鼠左鍵，就旋轉鏡頭
if ( mouse.button[0] )
{
Matrix4x4 rotate_matrix;
rotate_matrix.RotateY_Replace(mouse.x * rotation_speed);
rotate_matrix.RotateX(mouse.y * rotation_speed);
g_world_matrix = g_world_matrix * rotate_matrix;
}
}
}
void GetUserInput(void)
{
// `讀取滑鼠`
GutMouseInfo mouse;
GutReadMouse(&mouse);
// `讀取鍵盤`
char keyboard_state[256];
GutReadKeyboard(keyboard_state);
// `取得畫完前一個畫面到現在所經歷的時間`
float time_diff = g_Timer.Stop();
g_Timer.Restart();
float moving_speed = 2.0f * time_diff;
float rotation_speed = 1.0 * time_diff;
// `極座標系統`
static float theta = -MATH_PI * 0.5f;
static float phi = 0.0f;
// `如果按下滑鼠左鍵, 就旋轉鏡頭.`
if ( mouse.button[0] )
{
theta += mouse.x * rotation_speed;
phi -= mouse.y * rotation_speed;
}
float sin_phi, cos_phi;
float sin_theta, cos_theta;
FastMath::SinCos(phi, sin_phi, cos_phi);
FastMath::SinCos(theta, sin_theta, cos_theta);
// `計算鏡頭的面向`
Vector4 camera_facing;
camera_facing[0] = cos_phi * cos_theta;
camera_facing[1] = sin_phi;
camera_facing[2] = cos_phi * sin_theta;
// `計算鏡頭正上方的軸向`
Vector4 camera_up;
FastMath::SinCos(phi + MATH_PI*0.5f, sin_phi, cos_phi);
camera_up[0] = cos_phi * cos_theta;
camera_up[1] = sin_phi;
camera_up[2] = cos_phi * sin_theta;
// `取得鏡面右方的方向`
Vector4 camera_right = Vector3CrossProduct(camera_facing, camera_up);
// `按下W或方向鍵向上`
if ( keyboard_state[GUTKEY_W] || keyboard_state[GUTKEY_UP] )
{
g_eye += camera_facing * moving_speed;
}
// `按下S或方向鍵向下`
if ( keyboard_state[GUTKEY_S] || keyboard_state[GUTKEY_DOWN] )
{
g_eye -= camera_facing * moving_speed;
}
// `按下A或方向鍵向左`
if ( keyboard_state[GUTKEY_A] || keyboard_state[GUTKEY_LEFT] )
{
g_eye -= camera_right * moving_speed;
}
// `按下D或方向鍵向右`
if ( keyboard_state[GUTKEY_D] || keyboard_state[GUTKEY_RIGHT] )
{
g_eye += camera_right * moving_speed;
}
// `計算出鏡頭對準的點, 產生鏡頭轉換矩陣時會用到.`
g_lookat = g_eye + camera_facing;
// `因為是對2個軸轉動, 需要更新鏡頭朝上的軸.`
g_up = camera_up;
}
void main(void)
{
// 內定使用DirectX 9來繪圖
char *device = "dx9";
void (*render)(void) = RenderFrameDX9;
bool (*init_resource)(void) = InitResourceDX9;
bool (*release_resource)(void) = ReleaseResourceDX9;
void (*resize_func)(int width, int height) = ResizeWindowDX9;
#ifdef _ENABLE_DX10_
printf("Press\n(1) for Direct3D9\n(2) for OpenGL\n(3) for Direct3D10\n");
#else
printf("Press\n(1) for Direct3D9\n(2) for OpenGL\n");
#endif
int c = getche();
switch(c)
{
default:
case '1':
render = RenderFrameDX9;
init_resource = InitResourceDX9;
release_resource = ReleaseResourceDX9;
resize_func = ResizeWindowDX9;
break;
case '2':
device = "opengl";
init_resource = InitResourceOpenGL;
release_resource = ReleaseResourceOpenGL;
render = RenderFrameOpenGL;
resize_func = ResizeWindowOpenGL;
break;
#ifdef _ENABLE_DX10_
case '3':
device = "dx10";
init_resource = InitResourceDX10;
release_resource = ReleaseResourceDX10;
render = RenderFrameDX10;
resize_func = ResizeWindowDX10;
break;
#endif
}
printf("\nSelected %s device for rendering.\n", device);
GutResizeFunc( resize_func );
// 在(100,100)的位置開啟一個大小為(512x512)的視窗
GutCreateWindow(100, 100, 512, 512, device);
// 做OpenGL或DirectX初始化
if ( !GutInitGraphicsDevice(device) )
{
printf("Failed to initialize %s device\n", device);
exit(0);
}
//
GutInputInit();
GutRegisterKeyDown(GUTKEY_1, KeyDown_1);
GutRegisterKeyDown(GUTKEY_2, KeyDown_2);
GutRegisterKeyDown(GUTKEY_3, KeyDown_3);
GutRegisterKeyDown(GUTKEY_4, KeyDown_4);
GutRegisterKeyDown(GUTKEY_5, KeyDown_5);
GutRegisterKeyDown(GUTKEY_6, KeyDown_6);
GutRegisterKeyPressed(GUTKEY_EQUALS, KeyPressed_ADD);
GutRegisterKeyPressed(GUTKEY_MINUS, KeyPressed_MINUS);
GutRegisterKeyPressed(GUTKEY_ADD, KeyPressed_ADD);
GutRegisterKeyPressed(GUTKEY_SUBTRACT, KeyPressed_MINUS);
g_Control.SetCamera(Vector4(0.0f, 3.0f, 1.0f), Vector4(0.0f, 0.0f, 1.0f), Vector4(0.0f, 0.0f, 1.0f) );
g_Control.SetMoveSpeed(5.0f);
//
g_emitter.m_fEmitRate = 300;
g_emitter.m_fEmitTheta = FastMath::DegToRad(15.0f);
g_emitter.m_fParticleInitSpeed[0] = 1.0f;
g_emitter.m_fParticleInitSpeed[1] = 2.0f;
g_emitter.m_fParticleLife[0] = 1.5f;
g_emitter.m_fParticleLife[1] = 2.0f;
g_emitter.m_fParticleSize[0] = 0.05f;
g_emitter.m_fParticleSize[1] = 0.10f;
g_Particle.SetEmitter(g_emitter);
g_Particle.SetForce(Vector4(0.0f, 0.0f, -1.0f));
// 載入shader
if ( !init_resource() )
{
release_resource();
printf("Failed to load resources\n");
exit(0);
}
g_Timer.Restart();
// 主回圈
while( GutProcessMessage() )
{
GetUserInput();
//
framemove();
// 畫出矩形
render();
}
// 卸載shader
release_resource();
// 關閉OpenGL/DirectX繪圖裝置
GutReleaseGraphicsDevice();
}