Particle Renderers¶
Particle renderers add particles to the visible scene graph according to the information stored in the particle objects and the type of renderer. All particle renderers have the following parameters:
| Variable | Definition | Values |
| alphaMode | Alpha setting over particle lifetime | PR_ALPHA_NONE, PR_ALPHA_OUT, PR_ALPHA_IN, PR_ALPHA_USER |
| userAlpha | Alpha value for ALPHA_USER alpha mode | Boolean |
The following list contains the different types of renderers and their unique parameters.
PointParticleRenderer¶
Renders particles as pixel points.
| Variable | Definition | Values |
| pointSize | Width and height of points, in pixels | [0, infinity) |
| startColor | Starting color | (r, g, b, a) |
| endColor | Ending color | (r, g, b, a) |
| blendType | How the particles blend from the start color to the end color | ONE_COLOR, BLEND_LIFE, BLEND_VEL |
| blendMethod | Interpolation method between colors | LINEAR, CUBIC |
ONE_COLOR: point is always the starting color.
BLEND_LIFE: color is interpolated from start to end according to the age of the point
BLEND_VEL: color is interpolated between start to end according to the velocity/terminal velocity.
LineParticleRenderer¶
Renders particles as lines between their current position and their last position.
| Variable | Definition | Values |
| headColor | Color of leading end | (r, g, b, a) |
| tailColor | Color of trailing end | (r, g, b, a) |
SparkleParticleRenderer¶
Renders particles star or sparkle objects, three equal-length perpendicular axial lines, much like jacks. Sparkle particles appear to sparkle when viewed as being smaller than a pixel.
| Variable | Definition | Values |
| centerColor | Color of center | (r, g, b, a) |
| edgeColor | Color of edge | (r, g, b, a) |
| birthRadius | Initial sparkle radius | [0, infinity) |
| deathRadius | Final sparkle radius | [0, infinity) |
| lifeScale | Whether or not sparkle is always of radius birthRadius | NO_SCALE, SCALE |
SpriteParticleRenderer¶
Renders particles as an image, using a Panda3D texture object. The image is always facing the user.
| Variable | Definition | Values |
| texture | Panda texture object to use as the sprite image | (r, g, b, a) |
| color | Color | (r, g, b, a) |
| xScaleFlag | If true, x scale is interpolated over particle’s life | Boolean |
| yScaleFlag | If true, y scale is interpolated over particle’s life | Boolean |
| animAngleFlag | If true, particles are set to spin on the Z axis | Boolean |
| initial_X_Scale | Initial x scaling factor | [0, infinity) |
| final_X_Scale | Final x scaling factor | [0, infinity) |
| initial_Y_Scale | Initial y scaling factor | [0, infinity) |
| final_Y_Scale | Final y scaling factor | [0, infinity) |
| nonAnimatedTheta | If false, sets the counterclockwise Z rotation of all sprites, in degrees | Boolean |
| alphaBlendMethod | Sets the interpolation blend method | LINEAR, CUBIC |
| alphaDisable | If true, alpha blending is disabled | Boolean |
GeomParticleRenderer¶
Renders particles as full 3D objects. This requires a geometry node.
| Variable | Definition | Values |
| geomNode | A geometry scene graph node |