Rotate particle

[AggrorJorn]

I have this candle with a small flam particle attached to it. the particle itself is correct, but everytime I insert the candle in the scene. The flame is going into another direction. (see image).

 

Is there some way to control the angle of a particle? (the rotation of the particle itself is set to 0)

[Marleys Ghost]

is the flame an emitter ?

[AggrorJorn]

is the flame an emitter ?

yes.

 

object.fire=CreateEmitter(25,100,Vec3(0,1,0),0,object.model)
	object.fire:SetPositionf(0.01,0.52,-0.01,0)
	object.fire:Paint(LoadMaterial('abstract::candleflame.mat'),0)
	object.fire:SetRadius(0.1,0.1)
	object.fire:SetColorf(0.2,0.2,0.2,1,1)
	object.fire:SetWaver(0)
	object.fire:SetVelocity(Vec3(0,0.5,0),Vec3(0,0.05,0))
	object.fire:SetRotationSpeed(0)
	object.fire:SetArea(Vec3(0.05,0.05,0.05))

[Marleys Ghost]

object.fire:SetVelocity(Vec3(0,0.5,0),Vec3(0,0.05,0))

 

 

what are you trying to do here ? velocity is a Vec3 the above might act as x,y,z so you have direction in X and Y when you probably only want direction in the +y ..

[AggrorJorn]

object.fire:SetVelocity(Vec3(0,0.5,0),Vec3(0,0.05,0))

 

 

what are you trying to do here ? velocity is a Vec3 the above might act as x,y,z so you have direction in X and Y when you probably only want direction in the +y ..

hmm I used it to ad a litlle motion to the the flame. The velocity is effective when you create the particle and says in which direction the particle goes. I don't think the vilocity is the problem, since the values are going only in the y direction. But even if I would remove the vilocity then the flame texture still has a random angle.

[Josh]

Edit the particle vertex shader so rotation is not used. I am not sure why you are using an emitter for this, though.

 

In version 2.31, the particle velocities will be sent to the vertex shader. This could be used to orient the particles in the direction they are moving, for sparks and things like that.

[AggrorJorn]

What would you otherwise suggest instead of using a particle?

[Josh]

A mesh oriented to face the camera.

[AggrorJorn]

A mesh oriented to face the camera.

Sorry but I don't know how that would work. Do I have to think about a deforming mesh (which would complicate the situation) or are you suggesting an old style plane that is faced towards the camera with an animated texture?

[Josh]

The second thing you said.

[AggrorJorn]

OK thanks, I'll have a go with animated textures.