问候
我用这个方程生成了一个地形：
H(x,y) = (abs(sin(x * y)) + abs(sin(0,2 * x) + sin(0,4 * y)) + abs(cos(0,12 * x) + cos(0,47 * y))) * e^(0.005*(x+y))
现在，这给了我一个混合特征尺寸和一个不错的坡度。当我使用 scilab 绘制它时，这很好用。
我试图在 ac# 应用程序中导入它。
地形是在以下代码中创建的：
using System;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.DirectX.Direct3D;
using Microsoft.DirectX;
using System.Collections.Generic;
namespace Kamera_eins
{
public partial class Terrain : Form
{
public double[,] DTM;
string response ;
public Terrain()
{
InitializeComponent();
response = "";
DTM = new double[2048/4,2048/4];
}
public void BoxTheSky()
{
}
public void BoxTheLand()
{
mesh();
surf();
}
public void begin()
{
}
public void mesh()
{
response = "";
int i = new int();
int j = new int();
i = 0;
j = 0;
for (i=0;i<2048/4 ;i++ ) {
for (j=0;j<2048/4 ;j++ ) {
DTM[i,j] = Math.Abs (Math.Sin (j*i)) + Math.Abs(Math.Sin(0.2*i) * Math.Sin(0.4*j) ) + Math.Abs(Math.Cos(0.12* i) * Math.Cos(0.47*j));
DTM[i,j] = Math.Pow(Math.E, (0.012* (i + j)));
}
}
response = "DTM mesh ready";
}
public void surf()
{
}
}
}
这保存在一个名为 terrain.cs 的文件中，我将其设为 winform，因为我计划添加一个简单的文本框，稍后我可以在其中制作某种过程的实时日志。
现在，有另一个文件，在那个文件中，打算显示这个地形。第二个文件如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Data;
using System.IO;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using Microsoft.DirectX.DirectInput;
namespace Kamera_eins
{
public class viewport : Form
{
public Microsoft.DirectX.Direct3D.Device device = null;
public PresentParameters presentparameter = new PresentParameters();
public bool device_exists;
public bool show;
public int HEIGHT;
public int WIDTH;
public string paintDesc;
private float angle ;
private CustomVertex.PositionColored[] vertices;
public double[,] heightData;
private int[] indices;
private IndexBuffer ib;
private VertexBuffer vb;
private Microsoft.DirectX.DirectInput.Device keyb;
//public
public viewport()
{
this.ClientSize = new System.Drawing.Size(600, 600);
this.Text = "Terrain viewport";
WIDTH = 2048 / 4;
HEIGHT = 2048 / 4;
heightData = new double[HEIGHT,WIDTH];
keyb = new Microsoft.DirectX.DirectInput.Device(SystemGuid.Keyboard);
keyb.SetCooperativeLevel(this, CooperativeLevelFlags.Background | CooperativeLevelFlags.NonExclusive);
keyb.Acquire();
presentparameter.Windowed = true;
presentparameter.SwapEffect = SwapEffect.Discard;
presentparameter.AutoDepthStencilFormat = DepthFormat.D16;
presentparameter.EnableAutoDepthStencil = true;
this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);
try {
device = new Microsoft.DirectX.Direct3D.Device(0, Microsoft.DirectX.Direct3D.DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentparameter);
device.DeviceLost += new EventHandler(this.InvalidateDeviceObjects);
device.DeviceReset += new EventHandler(this.RestoreDeviceObjects);
device.Disposing += new EventHandler(this.DeleteDeviceObjects);
device.DeviceResizing += new CancelEventHandler(this.EnvironmentResizing);
device_exists = true;
} catch (Exception DirectException) {
device_exists = false;
}
}
private void setcamera()
{
device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 1f, 50f);
device.Transform.View = Matrix.LookAtLH (new Vector3(0, 0, 100), new Vector3(0, 0, 0) , new Vector3(0,0,1) );
device.RenderState.Lighting = false;
device.RenderState.FillMode = FillMode.WireFrame;
device.RenderState.CullMode = Cull.None;
}
public void declareVertex()
{
vb = new VertexBuffer(typeof(CustomVertex.PositionColored), HEIGHT*WIDTH, device, Usage.Dynamic | Usage.WriteOnly, CustomVertex.PositionColored.Format, Pool.Default);
vertices = new CustomVertex.PositionColored[HEIGHT*WIDTH];
for (int x=0;x< WIDTH;x++) {
for (int y=0; y< HEIGHT;y++) {
vertices[x + y * WIDTH].Position = new Vector3(x, y, (float)heightData[x,y]);
int r = Convert.ToInt32(205 * heightData[x,y] / 200 );
if(r>254)
r = 254;
vertices[x + y * WIDTH].Color = Color.FromArgb( r , 120 , 120).ToArgb();
}
}
vb.SetData(vertices, 0, LockFlags.None);
}
public void declareIndex()
{
ib = new IndexBuffer(typeof(int), (WIDTH-1)*(HEIGHT-1)*6, device, Usage.WriteOnly, Pool.Default);
indices = new int[(WIDTH-1)*(HEIGHT-1)*6];
for (int x=0;x< WIDTH-1;x++) {
for (int y=0; y< HEIGHT-1;y++) {
indices[(x+y*(WIDTH-1))*6] = (x+1)+(y+1)*WIDTH;
indices[(x+y*(WIDTH-1))*6+1] = (x+1)+y*WIDTH;
indices[(x+y*(WIDTH-1))*6+2] = x+y*WIDTH;
indices[(x+y*(WIDTH-1))*6+3] = (x+1)+(y+1)*WIDTH;
indices[(x+y*(WIDTH-1))*6+4] = x+y*WIDTH;
indices[(x+y*(WIDTH-1))*6+5] = x+(y+1)*WIDTH;
}
}
ib.SetData(indices, 0, LockFlags.None);
}
protected override void Dispose (bool disposing)
{
base.Dispose(disposing);
MessageBox.Show("");
}
protected virtual void InvalidateDeviceObjects(object sender, EventArgs e)
{
}
protected virtual void RestoreDeviceObjects(object sender, EventArgs e)
{
}
protected virtual void DeleteDeviceObjects(object sender, EventArgs e)
{
}
protected virtual void EnvironmentResizing(object sender, CancelEventArgs e)
{
}
public void run()
{
while(this.Created)
{
render();
setcamera();
// optional: loading the height using functional call:
// loadheight();
Application.DoEvents();
}
}
public void render()
{
if (device != null)
{
device.Clear(ClearFlags.Target, Color.Black, 1.0f, 0);
device.BeginScene();
//display terrain
device.VertexFormat = CustomVertex.PositionColored.Format;
device.SetStreamSource(0, vb, 0);
device.Indices = ib;
device.Transform.World = Matrix.Translation(-HEIGHT/2, -WIDTH/2, 0)*Matrix.RotationZ(angle) ;
device.DrawIndexedPrimitives(PrimitiveType.TriangleFan, 0, 0, WIDTH*HEIGHT, 0, indices.Length/3);
//turn off lights now
device.EndScene();
device.Present();
this.Invalidate();
readkeyboard();
}
}
void readkeyboard()
{
KeyboardState keys = keyb.GetCurrentKeyboardState();
if (keys[Key.Delete])
{
angle+=0.03f;
}
if (keys[Key.Next])
{
angle-=0.03f;
}
}
public void openport()
{
}
protected override void OnPaint(PaintEventArgs e)
{
render();
setcamera();
}
}
}
现在，还有第三个文件调用世界创建和显示：
void MainFormLoad(object sender, EventArgs e)
{
world = new World();
world.setterrain();
}
surf 和 box-somthing 函数还没有做任何事情。
我现在得到的只是一个黑色窗口（device.clear(...) 部分） - 我试图调整相机.. 没有成功
请帮忙，我想在窗口中显示地形....