public void Execute(TreeCrayon crayon, Random rnd)
{
foreach (TreeCrayonInstruction instruction in instructions)
{
instruction.Execute(crayon, rnd);
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
Matrix transform = crayon.GetTransform();
Vector3 branchDir = transform.Up;
Vector3 axis = Vector3.Up;
float dot = Vector3.Dot(axis, branchDir);
// If branch is almost perpendicular to alignment axis,
// just do nothing
if (Math.Abs(dot) > 0.999f)
return;
// project axis onto the crayon's XZ plane
Vector3 axisXZ = axis - dot*branchDir;
axisXZ.Normalize();
float cosAngle = Vector3.Dot(transform.Backward, axisXZ);
// The dot product of two normalized vectors is always in range [-1,1],
// but to account for rounding errors, we have to clamp it.
// Otherwise, Acos will return NaN in some cases.
cosAngle = MathHelper.Clamp(cosAngle, -1, 1);
// calculate the angle between the old Z-axis and axisXZ
// this is also the twist angle required to align the crayon
var rotation = (float) Math.Acos(cosAngle);
// finally, perform the twist
crayon.Twist(rotation);
}
public void Execute(TreeCrayon crayon, Random rnd)
{
Matrix transform = crayon.GetTransform();
Vector3 branchDir = transform.Up;
Vector3 axis = Vector3.Up;
float dot = Vector3.Dot(axis, branchDir);
// If branch is almost perpendicular to alignment axis,
// just do nothing
if (Math.Abs(dot) > 0.999f)
{
return;
}
// project axis onto the crayon's XZ plane
Vector3 axisXZ = axis - dot * branchDir;
axisXZ.Normalize();
float cosAngle = Vector3.Dot(transform.Backward, axisXZ);
// The dot product of two normalized vectors is always in range [-1,1],
// but to account for rounding errors, we have to clamp it.
// Otherwise, Acos will return NaN in some cases.
cosAngle = MathHelper.Clamp(cosAngle, -1, 1);
// calculate the angle between the old Z-axis and axisXZ
// this is also the twist angle required to align the crayon
float rotation = (float)Math.Acos(cosAngle);
// finally, perform the twist
crayon.Twist(rotation);
}
public void Execute(TreeCrayon crayon, Random rnd)
{
foreach (TreeCrayonInstruction instruction in instructions)
{
instruction.Execute(crayon, rnd);
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.PushState();
foreach (TreeCrayonInstruction instruction in instructions)
{
instruction.Execute(crayon, rnd);
}
crayon.PopState();
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.PushState();
foreach (TreeCrayonInstruction instruction in instructions)
{
instruction.Execute(crayon, rnd);
}
crayon.PopState();
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (crayon.Level >= Level && Type == CompareType.Greater || crayon.Level <= Level && Type == CompareType.Less)
{
foreach (TreeCrayonInstruction instruction in Instructions)
{
instruction.Execute(crayon, rnd);
}
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (crayon.Level >= Level && Type == CompareType.Greater || crayon.Level <= Level && Type == CompareType.Less)
{
foreach (TreeCrayonInstruction instruction in Instructions)
{
instruction.Execute(crayon, rnd);
}
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (rnd.NextDouble() < chance)
{
foreach (TreeCrayonInstruction child in instructions)
{
child.Execute(crayon, rnd);
}
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (rnd.NextDouble() < chance)
{
foreach (TreeCrayonInstruction child in instructions)
{
child.Execute(crayon, rnd);
}
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (crayon.Level == 0)
{
float rotation = 0.0f;
if (crayon.Skeleton.LeafAxis == null)
rotation = (float) rnd.NextDouble()*MathHelper.TwoPi;
crayon.Leaf(rotation,
size + sizeVariation*(2.0f*(float) rnd.NextDouble() - 1.0f),
color + colorVariation*(2.0f*(float) rnd.NextDouble() - 1.0f),
AxisOffset);
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (productions.Count == 0)
throw new InvalidOperationException("No productions exist for call.");
if (crayon.Level + deltaLevel < 0)
return;
crayon.Level = crayon.Level + deltaLevel;
int i = rnd.Next(0, productions.Count);
productions[i].Execute(crayon, rnd);
crayon.Level = crayon.Level - deltaLevel;
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (crayon.Level == 0)
{
float rotation = 0.0f;
if (crayon.Skeleton.LeafAxis == null)
{
rotation = (float)rnd.NextDouble() * MathHelper.TwoPi;
}
crayon.Leaf(rotation,
size + sizeVariation * (2.0f * (float)rnd.NextDouble() - 1.0f),
color + colorVariation * (2.0f * (float)rnd.NextDouble() - 1.0f),
AxisOffset);
}
}
public void Execute(TreeCrayon crayon, Random rnd)
{
if (productions.Count == 0)
{
throw new InvalidOperationException("No productions exist for call.");
}
if (crayon.Level + deltaLevel < 0)
{
return;
}
crayon.Level = crayon.Level + deltaLevel;
int i = rnd.Next(0, productions.Count);
productions[i].Execute(crayon, rnd);
crayon.Level = crayon.Level - deltaLevel;
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Forward(distance + variation*((float) rnd.NextDouble()*2 - 1), radiusScale);
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Twist(Util.Random(rnd, angle, variation));
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Scale(Util.Random(rnd, scale, variation));
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Level = crayon.Level + deltaLevel;
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Bone(Delta);
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Backward(Util.Random(rnd, distance, distanceVariation));
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Backward(Util.Random(rnd, distance, distanceVariation));
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Level = crayon.Level + deltaLevel;
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Pitch(Util.Random(rnd, angle, variation));
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Forward(distance + variation * ((float)rnd.NextDouble() * 2 - 1), radiusScale);
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Bone(Delta);
}
public void Execute(TreeCrayon crayon, Random rnd)
{
crayon.Scale(Util.Random(rnd, scale, variation));
}
