//准备退出，销毁包括device在内的一切资源:D3D/Win32/Device
public void CleanupGraphics()
{
//D3D资源
ToDispose(ms.mesh); ms.mesh = null;
ToDispose(ws.mesh); ws.mesh = null;
ToDispose(pl.vertexbuf); pl.vertexbuf = null;
ToDispose(wpl.vertexbuf); wpl.vertexbuf = null;
//一体Dispose sl及其VertexBuffer
ToDispose(sl); sl = null;
//销毁所有D3D字体
ToDispose(d3dfont_selected); d3dfont_selected = null;
ToDispose(d3dfont_hud); d3dfont_hud = null;
ToDispose(sprite); sprite = null; //销毁精灵
ToDispose(bkground_hud); bkground_hud = null; //销毁信息框背景相关的一切资源
//Win32资源
ToDispose(font_selected); font_selected = null;
ToDispose(font_hud); font_hud = null;
ToDispose(bmp_hud); bmp_hud = null;
//Device
ToDispose(device); device = null;
}
////////////////////////////////////////////////////////////////////////////////////
//重建除device之外的一切D3D资源
public void SetupDevice()
{
//重建所有的Mesh
if (ms.mesh == null)
{
ms.CreateExtrusionMesh(device);
}
if (ws.mesh == null)
{
ws.CreateWallMesh(device);
}
//重建所有的VertexBuffer
if (pl.vertexbuf == null)
{
pl.CreatePartitionLinesVertexBuffer(device);
}
if (wpl.vertexbuf == null)
{
wpl.CreateWallPartitionLinesVertexBuffer(device);
}
//一体创建sl及其VertexBuffer
if (sl == null)
{
sl = new SelectionLines(ms.polys[curr_district]);
sl.CreateSelectionLines(device);
}
////创建显示所需的字体
if (d3dfont_selected == null)
{
d3dfont_selected = new Microsoft.DirectX.Direct3D.Font(device, font_selected);
}
if (d3dfont_hud == null)
{
d3dfont_hud = new Microsoft.DirectX.Direct3D.Font(device, font_hud);
}
//设置信息框背景贴图
if (bkground_hud == null)
{
bkground_hud = new Texture(device, bmp_hud, Usage.Dynamic, Pool.Default);
}
//创建显示信息框的精灵
if (sprite == null)
{
sprite = new Sprite(device);
}
}
////////////////////////////////////////////////////////////////////////////////////
protected void OnDeviceLost(object sender, EventArgs e)
{
//释放除device外所有D3D资源
ToDispose(ms.mesh); ms.mesh = null;
ToDispose(ws.mesh); ws.mesh = null;
ToDispose(pl.vertexbuf); pl.vertexbuf = null;
ToDispose(wpl.vertexbuf); wpl.vertexbuf = null;
//一体Dispose sl及其VertexBuffer
ToDispose(sl); sl = null;
//销毁所有D3D字体
ToDispose(d3dfont_selected); d3dfont_selected = null;
ToDispose(d3dfont_hud); d3dfont_hud = null;
ToDispose(sprite); sprite = null; //销毁精灵
ToDispose(bkground_hud); bkground_hud = null; //销毁信息框背景相关的一切资源
}
////////////////////////////////////////////////////////////////////////////////////
#region Picking System相关
bool Picking(int sx, int sy)
{
float P11 = device.Transform.Projection.M11;
float P22 = device.Transform.Projection.M22;
//screen到projection平面，相当于首先抵消projection变换
float px = ((2F * sx) / client_size.Width - 1F) / P11;
float py = ((-2F * sy) / client_size.Height + 1F) / P22;
float pz = 1F;
Vector3 ray_pos = new Vector3(0F, 0F, 0F);
Vector3 ray_dir = new Vector3(px, py, pz);
//抵消world和view变换
Matrix invert = Matrix.Invert(device.Transform.World * device.Transform.View);
//最后计算在world中的射线
ray_pos.TransformCoordinate(invert);
ray_dir.TransformNormal(invert);
ray_dir.Normalize();
//计算ray与ms的相交多边形
int polyid = ms.MatchPicking(device, ray_pos, ray_dir);
if (polyid == -1)
{
return(false);
}
else
{
curr_district = polyid;
sl.Dispose();
sl = new SelectionLines(ms.polys[curr_district]);
sl.CreateSelectionLines(device);
}
return(true);
}
////////////////////////////////////////////////////////////////////////////////////
void Game_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.C:
EnableColoring = !EnableColoring;
EnableLights = false;
ms.mesh.Dispose();
ms = new ExtrusionMesh(sec, Color.White, EnableColoring);
ms.CreateExtrusionMesh(device);
break;
case Keys.Escape:
case Keys.Q:
Close(); break;
case Keys.K: //距离
//地图越大，将距离调最远时，越容易出现被culling的现象，估计跟projection有关
camera.IncreaseRadius(100F);
//if (scaling + 0.1F <= 5) scaling += 0.1f;
break;
case Keys.J: //距离
camera.DecreaseRadius(100F);
//if (scaling - 0.1F >= 0.1) scaling -= 0.1f;
break;
case Keys.Left: //视角
camera.DecreaseLongitude((float)(0.02 * Math.PI));
break;
case Keys.Right: //视角
camera.IncreaseLongitude((float)(0.02 * Math.PI));
break;
case Keys.Up: //视角
camera.IncreaseLatitude((float)(0.02F * Math.PI));
break;
case Keys.Down: //视角
camera.DecreaseLatitude((float)(0.02F * Math.PI));
break;
case Keys.Z: //光线方向
dir_light.AdjustLongitude((float)(-0.02 * Math.PI));
break;
case Keys.X: //光线方向
dir_light.AdjustLongitude((float)(0.02 * Math.PI));
break;
case Keys.A: //光线方向
dir_light.AdjustLatitude((float)(0.02 * Math.PI));
break;
case Keys.S: //光线方向
dir_light.AdjustLatitude((float)(-0.02 * Math.PI));
break;
case Keys.F: //区域线框
DisplayWireFrame = !DisplayWireFrame;
break;
case Keys.L: //光照开关
EnableLights = !EnableLights;
break;
case Keys.H: //水平面开关
DisplayHorizonalMesh = !DisplayHorizonalMesh;
break;
case Keys.V: //垂直面开关
DisplayVerticalMesh = !DisplayVerticalMesh;
break;
case Keys.I:
DisplayInfoHUD = !DisplayInfoHUD;
break;
case Keys.R: //复位world平移矢量和camera半径
world_translation = center;
camera.ResetRadius();
break;
#if (!FULL_SCREEN)
case Keys.O:
string fn = Program.SelectSecFile();
if (fn != null)
{
//从头创建所有的一切！
CleanupGraphics();
GC.Collect();
ResetAll(fn);
InitializeGraphics();
}
break;
#endif
case Keys.OemPeriod:
curr_district = (curr_district + 1) % ms.polys.Length;
sl.Dispose();
sl = new SelectionLines(ms.polys[curr_district]);
sl.CreateSelectionLines(device);
curr_centroid = ms.polys[curr_district].GetCentroid();
GenerateMessageString();
break;
case Keys.Oemcomma:
curr_district = (curr_district + ms.polys.Length - 1) % ms.polys.Length;
sl.Dispose();
sl = new SelectionLines(ms.polys[curr_district]);
sl.CreateSelectionLines(device);
curr_centroid = ms.polys[curr_district].GetCentroid();
GenerateMessageString();
break;
default:
Debug.WriteLine(e.KeyCode);
break;
}
}
////////////////////////////////////////////////////////////////////////////////////
void ResetAll(string fn)
{
////////////////////////////////////////////////////////////////////////////////////
//所有关键变量的清空和初始化
EnableColoring = true;
EnableLights = false;
DisplayWireFrame = true;
DisplayHorizonalMesh = true;
DisplayVerticalMesh = true;
DisplayInfoHUD = true;
//挤压Mesh的球面中心点
center = new Vector3();
//当前选中的多边形编号及其质心
curr_district = 0;
curr_centroid = new Vector3();
//world中的平移矢量
world_translation = new Vector3(); //其值要么等于center，要么等于当前选择的面质心坐标
//World等比放大系数，暂时不用
scaling = 1F;
//Direct3D相关
device = null;
device_lost = false;
present_params = null;
batch = 0;
//Direct3D资源相关
font_selected = font_hud = null;
d3dfont_selected = d3dfont_hud = null;
bmp_hud = null;
bkground_hud = null;
sprite = null;
//显示信息相关
filename = message = null;
//窗口状态相关
onpaint_enabled = true;
////////////////////////////////////////////////////////////////////////////////////
//生成原始数据和所有点、面和线框
sec = new Sec(fn);
ms = new ExtrusionMesh(sec, Color.White, EnableColoring);
ws = new WallMesh(sec, Color.Gainsboro);
pl = new PartitionLines(ms.polys, Color.Red);
wpl = new WallPartitionLines(sec, Color.Blue);
//对sl采取的管理策略是不同的，其VertexBuffer和其自身将被同时创建或删除
//这里无需初始化，InitializeGraphics中自然会初始化
sl = null;
//初始化当前选中的多边形的质心
curr_centroid = ms.polys[curr_district].GetCentroid();
//设置标题栏
FileInfo fi = new FileInfo(fn);
filename = fn; // fi.Name.ToLower();
Text = "3D .Sec Viewer - " + filename;
//初始化信息字符串
GenerateMessageString();
}