private void Form1_MouseDoubleClick(object sender, MouseEventArgs e)
{
Vector2 cursorpos = new Vector2((float)e.X, (float)e.Y);
Vector3 pickingPoint = CRay.GetPickingPoint(this.device, this.myTerrain.v3vertices, cursorpos, this.worldMatrix, this.viewMatrix, this.projectionMatrix);
if (pickingPoint != Vector3.Empty)
{
this.CenterX = pickingPoint.X / (float)this.myTerrain.WIDTH;
this.CenterY = pickingPoint.Y / (float)this.myTerrain.HEIGHT;
}
}
private void timer1_Tick(object sender, EventArgs e)
{
Vector2 cursorpos = new Vector2((float)this.LastMouseX2, (float)this.LastMouseY2);
Vector3 pickingPoint = CRay.GetPickingPoint(this.device, this.myTerrain.v3vertices, cursorpos, this.worldMatrix, this.viewMatrix, this.projectionMatrix);
if (pickingPoint != Vector3.Empty)
{
this.DoCao = -pickingPoint.Z * this.myTerrain.SCALE_FACTOR;
this.OnPaint();
}
else
{
this.DoCao = 0f;
this.OnPaint();
}
this.DoCao = 0f;
this.timer1.Enabled = false;
}
public static Vector3 GetPickingPoint(Device device, Vector3[] v3vertices, Vector2 cursorpos, Matrix worldMatrix, Matrix viewMatrix, Matrix projectionMatrix)
{
Vector3 result = Vector3.Empty;
Ray ray = CRay.CalculateCursorRay(device, cursorpos, projectionMatrix, viewMatrix, worldMatrix);
bool flag;
Vector3 item;
Vector3 item2;
Vector3 item3;
float num;
float num2;
if (CRay.RayIntersectsTerrain(ray, v3vertices, worldMatrix, out flag, out item, out item2, out item3, out num, out num2).HasValue)
{
List <Vector3> list = new List <Vector3>();
list.Add(item);
list.Add(item2);
list.Add(item3);
result = (1f - num - num2) * list[0] + num * list[1] + num2 * list[2];
}
return(result);
}
private static float?RayIntersectsTerrain(Ray ray, Vector3[] vertices, Matrix modelTransform, out bool insideBoundingSphere, out Vector3 vertex1, out Vector3 vertex2, out Vector3 vertex3, out float ptriangleU, out float ptriangleV)
{
vertex1 = (vertex2 = (vertex3 = new Vector3(0f, 0f, 0f)));
insideBoundingSphere = true;
float?num = null;
ptriangleU = 0f;
ptriangleV = 0f;
for (int i = 0; i < vertices.Length; i += 3)
{
float num2 = 0f;
float num3 = 0f;
float?num4;
CRay.RayIntersectsTriangle(ref ray, ref vertices[i], ref vertices[i + 1], ref vertices[i + 2], out num4, out num2, out num3);
if (num4.HasValue)
{
if (num.HasValue)
{
float?num5 = num4;
float?num6 = num;
if (num5.GetValueOrDefault() >= num6.GetValueOrDefault() || !(num5.HasValue & num6.HasValue))
{
goto IL_10E;
}
}
num = num4;
vertex1 = vertices[i];
vertex2 = vertices[i + 1];
vertex3 = vertices[i + 2];
ptriangleU = num2;
ptriangleV = num3;
}
IL_10E :;
}
return(num);
}
