// EVALUATE //
//
override public void Evaluate()
{
Vector4 customVector;
Vector3 position;
Vector3 pivotOffset;
Vector3 rotation;
Quaternion quaternionRotation;
Vector3 scale;
Color color;
bool shouldRecreateMesh;
bool shouldBeDoubleSided;
Quaternion camFacingRotation;
int vertexIndexSteps;
int triangleIndexSteps;
if (ownerBlueprint == null ||
ownerBlueprint.ownerEmitter == null ||
ownerBlueprint.ownerEmitter.particleMarkers == null)
{
return; // To fix null ref log spam after script rebuild.
}
if (finalMesh == null)
{
SoftReset();
}
ownerBlueprint.ownerEmitter.activeParticleIndices = ownerBlueprint.ownerEmitter.particleMarkers.GetActiveIndices();
particleCount = ownerBlueprint.ownerEmitter.activeParticleIndices.Length;
shouldRecreateMesh = (particleCount != lastParticleCount);
shouldBeDoubleSided = isDoubleSided.GetValue();
if (shouldBeDoubleSided)
{
vertexIndexSteps = 8;
triangleIndexSteps = 12;
}
else
{
vertexIndexSteps = 4;
triangleIndexSteps = 6;
}
// TODO: Investigate why this line fails at runtime around 2 * 4:
//shouldRecreateMesh = triangles.Length != particleCount * vertexIndexSteps;
if (shouldRecreateMesh)
{
finalMesh.Clear();
vertices = new Vector3[particleCount * vertexIndexSteps];
normals = new Vector3[particleCount * vertexIndexSteps];
tangents = new Vector4[particleCount * vertexIndexSteps];
uvs = new Vector2[particleCount * vertexIndexSteps];
uv2s = new Vector2[particleCount * vertexIndexSteps];
colors = new Color[particleCount * vertexIndexSteps];
triangles = new int[particleCount * triangleIndexSteps];
lastParticleCount = particleCount;
}
int particleIndex;
for (int i = 0; i < ownerBlueprint.ownerEmitter.activeParticleIndices.Length; i++)
{
particleIndex = ownerBlueprint.ownerEmitter.activeParticleIndices[i];
customVector = ownerBlueprint.customVectorStack.values[particleIndex];
position = AmpsHelpers.ConvertVector4Vector3(ownerBlueprint.ownerEmitter.blueprint.positionStack.values[particleIndex]); // Raw position stack result.
position = AmpsHelpers.RotateAroundPoint(position, ownerBlueprint.ownerEmitter.transform.position, Quaternion.Inverse(ownerBlueprint.ownerEmitter.transform.rotation));
position -= ownerBlueprint.ownerEmitter.emitterPosition; // Compensating for emitter position, turning position world relative.
pivotOffset = AmpsHelpers.ConvertVector4Vector3(ownerBlueprint.pivotOffsetStack.values[particleIndex]);
rotation = AmpsHelpers.ConvertVector4Vector3(ownerBlueprint.rotationStack.values[particleIndex]); // Raw particle stack result.
quaternionRotation = Quaternion.Inverse(ownerBlueprint.ownerEmitter.transform.rotation) * Quaternion.Euler(rotation);
scale = AmpsHelpers.ConvertVector4Vector3(ownerBlueprint.scaleStack.values[particleIndex]);
color = ownerBlueprint.colorStack.values[particleIndex];
// Setting up the quad, particle is at the center.
vertices[i * vertexIndexSteps] = (position + pivotOffset) + (new Vector3(scale.x, scale.y, 0) / 2);
vertices[i * vertexIndexSteps + 1] = (position + pivotOffset) + (new Vector3(-scale.x, scale.y, 0) / 2);
vertices[i * vertexIndexSteps + 2] = (position + pivotOffset) + (new Vector3(-scale.x, -scale.y, 0) / 2);
vertices[i * vertexIndexSteps + 3] = (position + pivotOffset) + (new Vector3(scale.x, -scale.y, 0) / 2);
switch (orientation.GetValue())
{
case (int)eOrientation.Rotated:
// Rotating the (pivot offset) vertices around particle position.
vertices[i * vertexIndexSteps] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps], position, quaternionRotation);
vertices[i * vertexIndexSteps + 1] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 1], position, quaternionRotation);
vertices[i * vertexIndexSteps + 2] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 2], position, quaternionRotation);
vertices[i * vertexIndexSteps + 3] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 3], position, quaternionRotation);
break;
case (int)eOrientation.CameraFacing:
camFacingRotation = Quaternion.LookRotation(ownerBlueprint.ownerEmitter.currentCameraTransform.forward, ownerBlueprint.ownerEmitter.currentCameraTransform.up);
camFacingRotation = Quaternion.Inverse(ownerBlueprint.ownerEmitter.transform.rotation) * camFacingRotation;
// TODO: Research if camera-particle position diff vector is better.
// Rotating all vertices around the center so the quad faces the camera.
vertices[i * vertexIndexSteps] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps], position, camFacingRotation);
vertices[i * vertexIndexSteps + 1] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 1], position, camFacingRotation);
vertices[i * vertexIndexSteps + 2] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 2], position, camFacingRotation);
vertices[i * vertexIndexSteps + 3] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 3], position, camFacingRotation);
break;
case (int)eOrientation.RotatedCameraFacing:
camFacingRotation = Quaternion.LookRotation(ownerBlueprint.ownerEmitter.currentCameraTransform.forward, ownerBlueprint.ownerEmitter.currentCameraTransform.up);
camFacingRotation = Quaternion.Inverse(ownerBlueprint.ownerEmitter.transform.rotation) * camFacingRotation;
camFacingRotation = camFacingRotation * Quaternion.Euler(rotation);
// Rotating all vertices around the center so the quad faces the camera.
vertices[i * vertexIndexSteps] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps], position, camFacingRotation);
vertices[i * vertexIndexSteps + 1] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 1], position, camFacingRotation);
vertices[i * vertexIndexSteps + 2] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 2], position, camFacingRotation);
vertices[i * vertexIndexSteps + 3] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 3], position, camFacingRotation);
break;
case (int)eOrientation.VectorAlignedCameraFacing:
//Vector3 upVector = Vector3.Normalize(alignmentVector.GetValue());
//Vector3 forwardVector = ownerBlueprint.ownerEmitter.currentCameraTransform.forward;
////ownerBlueprint.ownerEmitter.currentCameraTransform.up;
//camFacingRotation = Quaternion.LookRotation(forwardVector, upVector);
////camFacingRotation = Quaternion.Inverse(ownerBlueprint.ownerEmitter.transform.rotation) * camFacingRotation;
camFacingRotation = Quaternion.LookRotation(ownerBlueprint.ownerEmitter.currentCameraTransform.forward, Vector3.up);
Vector3 eulerRotation = camFacingRotation.eulerAngles;
eulerRotation.x = 0; // Discard rotation around x.
eulerRotation.z = 0; // Discard rotation around z.
camFacingRotation = Quaternion.Euler(eulerRotation);
// Rotating all vertices around the center so the quad faces the camera.
vertices[i * vertexIndexSteps] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps], position, camFacingRotation);
vertices[i * vertexIndexSteps + 1] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 1], position, camFacingRotation);
vertices[i * vertexIndexSteps + 2] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 2], position, camFacingRotation);
vertices[i * vertexIndexSteps + 3] = AmpsHelpers.RotateAroundPoint(vertices[i * vertexIndexSteps + 3], position, camFacingRotation);
break;
}
if (shouldBeDoubleSided)
{
vertices[i * vertexIndexSteps + 4] = vertices[i * vertexIndexSteps];
vertices[i * vertexIndexSteps + 5] = vertices[i * vertexIndexSteps + 1];
vertices[i * vertexIndexSteps + 6] = vertices[i * vertexIndexSteps + 2];
vertices[i * vertexIndexSteps + 7] = vertices[i * vertexIndexSteps + 3];
}
colors[i * vertexIndexSteps] = color;
colors[i * vertexIndexSteps + 1] = color;
colors[i * vertexIndexSteps + 2] = color;
colors[i * vertexIndexSteps + 3] = color;
if (shouldBeDoubleSided)
{
if ((eDoubleSidedColorMode)doubleSidedColorMode.GetValue() == eDoubleSidedColorMode.ColorStack)
{
colors[i * vertexIndexSteps + 4] = colors[i * vertexIndexSteps];
colors[i * vertexIndexSteps + 5] = colors[i * vertexIndexSteps + 1];
colors[i * vertexIndexSteps + 6] = colors[i * vertexIndexSteps + 2];
colors[i * vertexIndexSteps + 7] = colors[i * vertexIndexSteps + 3];
}
else
{
colors[i * vertexIndexSteps + 4] = customVector;
colors[i * vertexIndexSteps + 5] = customVector;
colors[i * vertexIndexSteps + 6] = customVector;
colors[i * vertexIndexSteps + 7] = customVector;
}
}
switch (normalMode.GetValue())
{
case (int)eNormalMode.Skip:
break;
case (int)eNormalMode.Flat:
Vector3 calculatedNormal = Vector3.Cross((vertices[i * vertexIndexSteps + 2] - vertices[i * vertexIndexSteps]), (vertices[i * vertexIndexSteps + 1] - vertices[i * vertexIndexSteps]));
calculatedNormal = Vector3.Normalize(calculatedNormal);
normals[i * vertexIndexSteps] = calculatedNormal;
normals[i * vertexIndexSteps + 1] = calculatedNormal;
normals[i * vertexIndexSteps + 2] = calculatedNormal;
normals[i * vertexIndexSteps + 3] = calculatedNormal;
break;
}
if (shouldBeDoubleSided)
{
normals[i * vertexIndexSteps + 4] = normals[i * vertexIndexSteps] * -1;
normals[i * vertexIndexSteps + 5] = normals[i * vertexIndexSteps + 1] * -1;
normals[i * vertexIndexSteps + 6] = normals[i * vertexIndexSteps + 2] * -1;
normals[i * vertexIndexSteps + 7] = normals[i * vertexIndexSteps + 3] * -1;
}
switch (uv2Mode.GetValue())
{
case (int)eUV2Mode.Skip:
break;
case (int)eUV2Mode.CustomVectorXY:
uv2s[i * vertexIndexSteps] = new Vector2(customVector.x, customVector.y);
uv2s[i * vertexIndexSteps + 1] = new Vector2(customVector.x, customVector.y);
uv2s[i * vertexIndexSteps + 2] = new Vector2(customVector.x, customVector.y);
uv2s[i * vertexIndexSteps + 3] = new Vector2(customVector.x, customVector.y);
break;
case (int)eUV2Mode.CustomVectorXYZW: // BUG: Doesn't really work...
Vector2 calculatedUv2 = Vector2.zero;
calculatedUv2.x = AmpsHelpers.PackVector2(new Vector2(customVector.x, customVector.y));
calculatedUv2.y = AmpsHelpers.PackVector2(new Vector2(customVector.z, customVector.w));
uv2s[i * vertexIndexSteps] = calculatedUv2;
uv2s[i * vertexIndexSteps + 1] = calculatedUv2;
uv2s[i * vertexIndexSteps + 2] = calculatedUv2;
uv2s[i * vertexIndexSteps + 3] = calculatedUv2;
break;
}
if (shouldBeDoubleSided)
{
uv2s[i * vertexIndexSteps + 4] = uv2s[i * vertexIndexSteps];
uv2s[i * vertexIndexSteps + 5] = uv2s[i * vertexIndexSteps + 1];
uv2s[i * vertexIndexSteps + 6] = uv2s[i * vertexIndexSteps + 2];
uv2s[i * vertexIndexSteps + 7] = uv2s[i * vertexIndexSteps + 3];
}
switch (tangentMode.GetValue())
{
case (int)eTangentMode.Skip:
break;
case (int)eTangentMode.Generate:
//Vector3 rawTangent = Vector3.Normalize(vertices[i * 4 + 3] - vertices[i * 4 + 1]);
Vector3 rawTangent = Vector3.Normalize(vertices[i * 4 + 0] - vertices[i * 4 + 1]);
Vector4 calculatedTangent = new Vector4(rawTangent.x, rawTangent.y, rawTangent.z, -1);
tangents[i * vertexIndexSteps] = calculatedTangent;
tangents[i * vertexIndexSteps + 1] = calculatedTangent;
tangents[i * vertexIndexSteps + 2] = calculatedTangent;
tangents[i * vertexIndexSteps + 3] = calculatedTangent;
break;
case (int)eTangentMode.CustomVectorXYZW:
tangents[i * vertexIndexSteps] = customVector;
tangents[i * vertexIndexSteps + 1] = customVector;
tangents[i * vertexIndexSteps + 2] = customVector;
tangents[i * vertexIndexSteps + 3] = customVector;
break;
}
if (shouldBeDoubleSided)
{
// TODO: Should it be multiplied by -1?
tangents[i * vertexIndexSteps + 4] = tangents[i * vertexIndexSteps];
tangents[i * vertexIndexSteps + 5] = tangents[i * vertexIndexSteps + 1];
tangents[i * vertexIndexSteps + 6] = tangents[i * vertexIndexSteps + 2];
tangents[i * vertexIndexSteps + 7] = tangents[i * vertexIndexSteps + 3];
}
if (shouldRecreateMesh) // Things go in here which don't change unless particle count changes.
{
uvs[i * vertexIndexSteps] = new Vector2(1, 1);
uvs[i * vertexIndexSteps + 1] = new Vector2(0, 1);
uvs[i * vertexIndexSteps + 2] = new Vector2(0, 0);
uvs[i * vertexIndexSteps + 3] = new Vector2(1, 0);
if (shouldBeDoubleSided)
{
uvs[i * vertexIndexSteps + 4] = new Vector2(1, 1);
uvs[i * vertexIndexSteps + 5] = new Vector2(0, 1);
uvs[i * vertexIndexSteps + 6] = new Vector2(0, 0);
uvs[i * vertexIndexSteps + 7] = new Vector2(1, 0);
}
//First triangle.
triangles[i * triangleIndexSteps] = i * vertexIndexSteps;
triangles[i * triangleIndexSteps + 1] = i * vertexIndexSteps + 2;
triangles[i * triangleIndexSteps + 2] = i * vertexIndexSteps + 1;
//Second triangle.
triangles[i * triangleIndexSteps + 3] = i * vertexIndexSteps + 2;
triangles[i * triangleIndexSteps + 4] = i * vertexIndexSteps;
triangles[i * triangleIndexSteps + 5] = i * vertexIndexSteps + 3;
if (shouldBeDoubleSided)
{
//Third triangle.
triangles[i * triangleIndexSteps + 6] = i * vertexIndexSteps + 5;
triangles[i * triangleIndexSteps + 7] = i * vertexIndexSteps + 6;
triangles[i * triangleIndexSteps + 8] = i * vertexIndexSteps + 4;
//Forth triangle.
triangles[i * triangleIndexSteps + 9] = i * vertexIndexSteps + 7;
triangles[i * triangleIndexSteps + 10] = i * vertexIndexSteps + 4;
triangles[i * triangleIndexSteps + 11] = i * vertexIndexSteps + 6;
}
}
}
// TODO: Bubble sort with limited run time.
finalMesh.vertices = vertices;
finalMesh.uv = uvs;
finalMesh.uv2 = uv2s;
finalMesh.normals = normals;
finalMesh.tangents = tangents;
finalMesh.colors = colors;
finalMesh.triangles = triangles;
}
