[Opensim-dev] llParticleSystem progress & questions

[Charles Krinke]

Dear Tedd & others:
 
Please view the logic below as pseudo-code right now, although it does compile in LSL_BuiltIn_Commands.cs, and most of it is in focus, I am struggling with a few notions that I tried to encapsulate in my 4 questions. And thank you, lbsa and Tedd for getting me this far. Just bear with me as I work through the rest.
 
Questions:
 
1. It is not obvious to me how the CRC is calculated, nor which rule number, if any, it should be. We do have a CRC member in the Primitive.ParticleSystem structure and I assume that the client needs it in order to process the packet.
 
2. I dont see where AngularVelocity is coming from the client, and I do see it defined in libsecondlife.ParticleSystem.cs;GetBytes().
 
3. I see Omega, maybe coming in from the client, but I dont see it defined in libsecondlife.ParticleSystem.cs:GetBytes()
 
4. StartScale and EndScale are two seperate items from the wiki.secondlife.com viewpoiont, that is X & Y, but appear to be one rule from the "www.caligari-designs.com/p4u2' viewpoint.
 
 
 
/* particle system rules should be coming into this routine as doublets, that is
rule[0] should be an integer from this list and rule[1] should be the arg
for the same integer. wiki.secondlife.com has most of this mapping, but some
came from http://www.caligari-designs.com/p4u2
We iterate through the list for 'Count' elements, incrementing by two for each
iteration and set the members of Primitive.ParticleSystem, one at a time.
*/
public enum PrimitiveRule : int
{
PSYS_PART_FLAGS = 0, 
PSYS_PART_START_COLOR = 1,
PSYS_PART_START_ALPHA = 2,
PSYS_PART_END_COLOR = 3,
PSYS_PART_END_ALPHA = 4,
PSYS_PART_START_SCALE = 5,
PSYS_PART_END_SCALE = 6,
PSYS_PART_MAX_AGE = 7,
PSYS_SRC_ACCEL = 8,
PSYS_SRC_PATTERN = 9,
PSYS_SRC_TEXTURE = 12,
PSYS_SRC_BURST_RATE = 13,
PSYS_SRC_BURST_PART_COUNT = 15,
PSYS_SRC_BURST_RADIUS = 16,
PSYS_SRC_BURST_SPEED_MIN = 17,
PSYS_SRC_BURST_SPEED_MAX = 18,
PSYS_SRC_MAX_AGE = 19,
PSYS_SRC_TARGET_KEY = 20,
PSYS_SRC_OMEGA = 21,
PSYS_SRC_ANGLE_BEGIN = 22,
PSYS_SRC_ANGLE_END = 23
}
public void llParticleSystem(List<Object> rules) 
{
Primitive.ParticleSystem prules = new Primitive.ParticleSystem();
for (int i = 0; i < rules.Count; i += 2)
{
switch ( (int)rules[i])
{
case (int)PrimitiveRule.PSYS_PART_FLAGS:
prules.PartFlags = (uint)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_START_COLOR:
prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_START_ALPHA:
//what is the cast? prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_END_COLOR:
prules.PartEndColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_END_ALPHA:
//what is the cast? prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_START_SCALE:
//what is the cast? prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_END_SCALE:
//what is the cast? prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_PART_MAX_AGE:
prules.MaxAge = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_ACCEL:
//what is the cast? prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_PATTERN:
//what is the cast? prules.PartStartColor = (LLColor)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_TEXTURE:
prules.Texture = (LLUUID)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_BURST_RATE:
prules.BurstRate = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_BURST_PART_COUNT:
prules.BurstPartCount = (byte)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_BURST_RADIUS:
prules.BurstRadius = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_BURST_SPEED_MIN:
prules.BurstSpeedMin = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_BURST_SPEED_MAX:
prules.BurstSpeedMax = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_MAX_AGE:
prules.MaxAge = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_TARGET_KEY:
prules.Target = (LLUUID)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_OMEGA:
//cast?? prules.MaxAge = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_ANGLE_BEGIN:
prules.InnerAngle = (float)rules[i + 1];
break;
case (int)PrimitiveRule.PSYS_SRC_ANGLE_END:
prules.OuterAngle = (float)rules[i + 1];
break;
}
}
// prules.AngularVelocity = (LLVector3)rules[0];
// prules.CRC = (uint)rules[6];
// prules.PartAcceleration = (LLVector3)rules[10];
// prules.PartDataFlags = (Primitive.ParticleSystem.ParticleDataFlags)rules[11];
// prules.PartEndScaleX = (float)rules[13];
// prules.PartEndScaleY = (float)rules[14];
// prules.PartStartScaleX = (float)rules[18];
// prules.PartStartScaleY = (float)rules[19];
// prules.StartAge = (float)rules[21];
m_host.AddNewParticleSystem( prules );
}
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