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Below is a chart describing the different features available with each Particle Type:
Features / Particle Type
|
Pixel
|
Sprite
|
Point Sprite
|
Quad
|
Textured Quad
|
Vertices Required
|
1
|
1
|
1
|
4
|
4
|
Position
|
3D world coordinate
|
2D screen coordinate +
optional Z value
|
3D world coordinate
|
3D world coordinate
|
3D world coordinate
|
Color
|
Yes
|
Optional
|
Optional
|
Yes
|
Optional
|
Texture
|
No
|
Yes
|
Yes
|
No
|
Yes
|
Rotation
|
No
|
Roll
|
Roll
|
Yaw, Pitch, Roll
|
Yaw, Pitch, Roll
|
Size
|
1 pixel
|
X width, Y height
|
X width, Y height
|
N / A
|
N / A
|
Shape
|
N / A
|
Rectangle
|
Square
|
Quadrilateral
|
Quadrilateral
|
Always Faces Camera
|
N / A
|
Yes
|
Yes
|
Optional
|
Optional
|
The No Display Particle Type is not shown, as none of these properties apply to it since it is not visualized (e.g. drawn to the screen).
Below is a chart describing some of the different features available with each of the different Default Particle classes provided by DPSF (smaller Size in Vertex Buffer is better):
Features / Particle Type
|
Default Pixel
|
Default Sprite
|
Default Point Sprite
|
Default Quad
|
Default Textured Quad
|
Vertices Required
|
1
|
1
|
1
|
4
|
4
|
Position
|
3D world coordinate
|
2D screen coordinate +
optional Z value
|
3D world coordinate
|
3D world coordinate
|
3D world coordinate
|
Color
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Texture
|
No
|
Yes
|
Yes
|
No
|
Yes
|
Rotation
|
No
|
Roll
|
Roll
|
Yaw, Pitch, Roll
|
Yaw, Pitch, Roll
|
Size
|
1 pixel
|
X width, Y height
|
X width, Y height
|
X width, Y height
|
X width, Y height
|
Shape
|
N / A
|
Rectangle
|
Square
|
Rectangle
|
Rectangle
|
Always Faces Camera
|
N / A
|
Yes
|
Yes
|
Optional
|
Optional
|
Size in Vertex Buffer
|
16 Bytes
|
N / A
|
24 Bytes
|
16 * 4 = 64 Bytes
|
24 * 4 = 96 Bytes
|
|