public void Smooths_Velocity()
{
var input = new[]
{
new PathStepDefinition {
F = 5, X = 4, Y = -4, In = 2, Out = 2
}, // fc == -4
new PathStepDefinition {
F = 1, X = 16, Y = 16
},
};
var result = _transformer.TransformPath(input);
var expected = new OutputPathStepInfo[]
{
new OutputPathStepInfo {
FrameCount = 1, VelocityX = 1, VelocityY = -1
},
new OutputPathStepInfo {
FrameCount = 1, VelocityX = 3, VelocityY = -3
},
new OutputPathStepInfo {
FrameCount = 1, VelocityX = 4, VelocityY = -4
}, // Correct speed
new OutputPathStepInfo {
FrameCount = 1, VelocityX = 7, VelocityY = 1
},
new OutputPathStepInfo {
FrameCount = 1, VelocityX = 13, VelocityY = 11
},
new OutputPathStepInfo {
FrameCount = 1, VelocityX = 16, VelocityY = 16
},
};
CollectionAssert.AreEqual(expected.ToStringCollection(), result.ToStringCollection());
}
public IEnumerable <OutputPathStepInfo> ProcessPath(IEnumerable <OutputPathStepInfo> steps)
{
short curVx = 0;
short curVy = 0;
short curFrame = 0;
PathInstructionDefinition curInstruction = PathInstructionDefinition.Delta;
string emitLabel = null;
var output = new List <OutputPathStepInfo>();
var endCode = new OutputPathStepInfo {
VelocityY = 0, VelocityX = 0, FrameCount = 0, Instruction = PathInstructionDefinition.End
};
foreach (var step in steps.Concat(new[]
{
endCode
}))
{
if (step.VelocityX != curVx || step.VelocityY != curVy || !string.IsNullOrWhiteSpace(step.Label) || step.Instruction != curInstruction)
{
if (curInstruction == PathInstructionDefinition.Delta)
{
if (curFrame > 0)
{
while (curFrame > 0)
{
var emitCount = (short)Math.Min((long)curFrame, 255);
output.Add(
new OutputPathStepInfo
{
FrameCount = (byte)emitCount,
VelocityX = curVx,
VelocityY = curVy,
Label = emitLabel,
Instruction = curInstruction,
});
emitLabel = null;
curFrame -= emitCount;
}
}
}
else
{
output.Add(
new OutputPathStepInfo
{
FrameCount = (short)curFrame,
VelocityX = curVx,
VelocityY = curVy,
Label = emitLabel,
Instruction = curInstruction,
});
}
curFrame = step.FrameCount;
curVx = step.VelocityX;
curVy = step.VelocityY;
curInstruction = step.Instruction;
emitLabel = step.Label;
}
else
{
curFrame += step.FrameCount;
}
}
// Get list of labels
var offset = 0;
var labels = new Dictionary <string, int>();
foreach (var step in output)
{
if (step.Instruction != PathInstructionDefinition.Jump &&
!string.IsNullOrWhiteSpace(step.Label))
{
labels.Add(step.Label, offset);
}
offset += PathsProcessor.PathStructSize;
}
// Process jump instructions
offset = 0;
foreach (var step in output)
{
try
{
if (step.Instruction == PathInstructionDefinition.Jump)
{
var jumpOffset = labels[step.Label] - offset;
step.FrameCount = 0;
step.VelocityX = 0;
step.VelocityY = 0;
step.Label = null;
step.JumpDelta = (short)jumpOffset;
}
}
catch
{
throw new ConversionException($"Cannot find label {step.Label} for path jump");
}
offset += PathsProcessor.PathStructSize;
}
output.Add(endCode);
return(output);
}