/// <summary>
/// Set colors on points on the plane
/// </summary>
private void SetColors(PrimitivePlane plane)
{
//fUpdateColors = false;
int max = plane.Segments;
Color color1 = Color.SkyBlue;
Color color2 = Color.DeepSkyBlue;
bool useColor1 = true;
for (int x = 0; x <= max; x++)
{
Color color;
for (int z = 0; z <= max; z++)
{
VertexPositionNormalColor p1 = plane.GetPoint(x, z);
if (useColor1)
{
color = color1;
}
else
{
color = color2;
}
if (useColor1)
{
color.R = (byte)(255 * z / max);
}
useColor1 = !useColor1;
p1.Color = color;
plane.SetPoint(x, z, p1);
}
useColor1 = !useColor1;
}
}
/// <summary>
/// Allows the game component to update itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
if (this.Manager.KeyPressed(Keys.M))
{
switch (fDrawMode)
{
case DrawMode.Grid:
CurrentDrawMode = DrawMode.Solid;
break;
case DrawMode.Solid:
CurrentDrawMode = DrawMode.WireFrame;
break;
case DrawMode.WireFrame:
CurrentDrawMode = DrawMode.Grid;
break;
}
}
else if (this.Manager.KeyPressed(Keys.C))
{
switch (fColorMode)
{
case ColorMode.Points:
CurrentColorMode = ColorMode.SkyBlue;
break;
case ColorMode.SkyBlue:
CurrentColorMode = ColorMode.Points;
break;
}
}
else if (this.Manager.KeyPressed(Keys.N))
{
switch (fNormalMode)
{
case NormalMode.Crazy:
CurrentNormalMode = NormalMode.Standard;
break;
case NormalMode.Standard:
CurrentNormalMode = NormalMode.Crazy;
break;
}
}
fCamera.Update(gameTime);
double seconds = gameTime.TotalGameTime.TotalSeconds;
if (!fHalted)
{
fUpdateDiagram = true;
}
fUpdateDiagram = fUpdateDiagram || fUpdatePlane;
fUpdateColors = fUpdateColors || fUpdateDiagram;
fUpdateNormals = fUpdateNormals || fUpdateDiagram;
if (fUpdatePlane)
{
SetPlane();
}
int max = fPlane.Segments;
if (fUpdateDiagram)
{
fUpdateDiagram = false;
for (int x = 0; x <= max; x++)
{
float nX = 2.0f * (float)x / max - 1.0f;// -1 to +1
for (int z = 0; z <= max; z++)
{
float nZ = 2.0f * (float)z / max - 1.0f;
double r = Math.Sqrt(nX * nX + nZ * nZ);
// function
double y = nX * Math.Cos(r * 7.0f - seconds * 4.2f) +
nZ * Math.Sin((r - 0.5) * 10.0f - seconds * 1.9f);
float height = 200.0f * (float)y;
fPlane.SetHeight(x, z, height);
}
}
}
if (fUpdateColors)
{
SetColors();
}
if (fUpdateNormals)
{
switch (fNormalMode)
{
case NormalMode.Crazy:
for (int x = 0; x <= max; x++)
{
float nX = 2.0f * (float)x / max - 1.0f; // -1 to +1
for (int z = 0; z <= max; z++)
{
float nZ = 2.0f * (float)z / max - 1.0f;
// function
double r = Math.Sqrt(nX * nX + nZ * nZ);
VertexPositionNormalColor p = fPlane.GetPoint(x, z);
p.Normal = Vector3.Normalize(new Vector3(
Convert.ToSingle(Math.Cos(r * 1.0f + 0.5f - seconds * 0.1f)),
Convert.ToSingle(Math.Cos(r * 2.0f + 2.1f - seconds * 0.2f)),
Convert.ToSingle(Math.Cos(r * 5.1f * seconds))));
fPlane.SetPoint(x, z, p);
}
}
break;
case NormalMode.Standard:
fPlane.GenerateNormals();
break;
}
}
base.Update(gameTime);
}