public Form1()
{
InitializeComponent();
this.Width = width;
this.Height = height;
this.DoubleBuffered = true;
cubePosition = POSITION.LEFT;
movingVector = new Vector3D(cube.size * 2, 0, 0);
timer1.Start();
}
public List<Vector3D> ViewProjectionTransform(Matrix m, List<Vector3D> vb)
{
List<Vector3D> result = new List<Vector3D>();
Matrix Tview = Matrix.ViewMatrix(r, theta, phi);
Vector3D vp = new Vector3D();
foreach (Vector3D v in vb)
{
vp = m * v;
vp = Tview * vp;
vp = Matrix.ProjectionMatrix(d, vp.z) * vp;
result.Add(vp);
}
return result;
}
public static Vector3D[,] Viewporttransformation(int width, int height, Vector3D[,] vb, int vbSize)
{
Vector3D[,] result = new Vector3D[vbSize, vbSize];
float cx = (float)(width * 0.75) + (_3DWorld.worldSize);
float cy = (float)(height * 0.75);
for (int i = 0; i < vbSize; i++)
{
for (int j = 0; j < vbSize; j++)
{
var v = vb[i, j];
result[i, j] = new Vector3D(v.x + cx, v.y + cy, 0);
}
}
return result;
}
public _3DWorld(int width, int height)
{
this.width = width;
this.height = height;
this.lineLength = (width - 40) / worldSize;
if (this.lineLength > 1)
this.lineLength = 1;
this.values = new Vector3D[worldSize, worldSize];
for (int i = 0; i < worldSize; i++)
for (int j = 0; j < worldSize; j++)
values[i, j] = new Vector3D(i, 0, j);
//Set the middle height to 1;
var midPoint = worldSize / 2;
values[midPoint, midPoint] = new Vector3D(midPoint, 1, midPoint);
CalculateHeightValues();
}
public void CalculateHeightValues(Vector3D topLeft, Vector3D bottomRight, int levelOfDetail, float yDelta)
{
if (levelOfDetail > levelOfDetails)
return;
//Diamond step
//Get the square midpoint
int midpointX = (int)(topLeft.x + bottomRight.x) / 2;
int midpointZ = (int)(topLeft.z + bottomRight.z) / 2;
float midpointAvgY = (topLeft.y + bottomRight.y + GetTopRight(topLeft, bottomRight).y + GetBottomLeft(topLeft, bottomRight).y) / 4;
midpointAvgY += (float)rand.NextDouble() * yDelta;
Vector3D midpoint = new Vector3D(midpointX, midpointAvgY, midpointZ);
values[(int)midpointX, (int)midpointZ] = midpoint;
//Update some values before proceeding to the next level of detail
levelOfDetail++;
yDelta = yDelta / 2;
//Continue recursively
//x|0
//0|0
CalculateHeightValues(topLeft, midpoint, levelOfDetail, yDelta);
//0|0
//0|x
CalculateHeightValues(midpoint, bottomRight, levelOfDetail, yDelta);
//0|x
//0|0
var middleTop = values[(int)midpoint.x, (int)topLeft.z];
var middleRight = values[(int)bottomRight.x, (int)midpoint.z];
CalculateHeightValues(middleTop, middleRight, levelOfDetail, yDelta);
//0|0
//x|0
var middleLeft = values[(int)topLeft.x, (int)midpoint.z];
var middleBottom = values[(int)midpoint.x, (int)bottomRight.z];
CalculateHeightValues(middleLeft, middleBottom, levelOfDetail, yDelta);
}
private Vector3D GetTopRight(Vector3D topLeft, Vector3D bottomRight)
{
return values[(int)bottomRight.x, (int)topLeft.z];
}
public void Draw(Graphics g, Vector3D[,] transValues)
{
for (int i = 0; i < worldSize; i++)
{
for (int j = 0; j < worldSize; j++)
{
//Current point
var currentPoint = transValues[i, j];
if ((i + 1) < worldSize && (j + 1) < worldSize)
{
Point[] points = new Point[4];
points[0] = new Point((int)currentPoint.x, (int)currentPoint.y);
points[1] = new Point((int)(transValues[i + 1, j].x * lineLength), (int)(transValues[i + 1, j].y * lineLength));
points[2] = new Point((int)(transValues[i + 1, j + 1].x * lineLength), (int)(transValues[i + 1, j + 1].y * lineLength));
points[3] = new Point((int)(transValues[i, j + 1].x * lineLength), (int)(transValues[i, j + 1].y * lineLength));
g.FillPolygon(Brushes.White, points);
g.DrawPolygon(pen, points);
}
}
}
}
public static Matrix Translate(Vector3D t)
{
return new Matrix(1, 0, 0, t.x,
0, 1, 0, -t.y,
0, 0, 1, t.z,
0, 0, 0, 1);
}
public static Matrix InvertTranslate(Vector3D t)
{
return Translate(t * -1f);
}
public Vector3D[,] ViewProjectionTransform(Matrix m, Vector3D[,] vb, int vbSize)
{
Vector3D[,] result = new Vector3D[vbSize, vbSize];
Matrix Tview = Matrix.ViewMatrix(r, theta, phi);
Vector3D vp = new Vector3D();
for (int i = 0; i < vbSize; i++)
{
for (int j = 0; j < vbSize; j++)
{
Vector3D v = vb[i, j];
vp = m * v;
vp = Tview * vp;
vp = Matrix.ProjectionMatrix(d, vp.z) * vp;
result[i, j] = vp;
}
}
return result;
}
