Particle Setting

Texture

• Diffuse – You can change the color or image for each particle.

• Opacity – This parameter decides the shape and the transparency of your particles.

• Please refer to Multiple Channel Texture Mapping for more details.

Color

• Start/End Color – Define a color to be blended with the image you load for the particles when they are generated/eliminated.

• Start/End Opacity – Set the level for each particles to be transparent as it is generated/eliminated. Set 0 to make it totally transparent and 255, opaque.

Blend Mode

These three radio buttons in this group defines how the particles to be blended with the background.

• Alpha – You may see the original color of the image for each particle.

• Addition – The RGB color of the image for each particle will be added onto the color of the background. This parameter is useful especially when you want to create glowing particles in your projects.

• Subtraction – The RGB color of the image for each particle will be subtracted from the color of the background.

Size

The size of each particle can be modified via the settings in this group so it transforms gradually and linearly within its life span.

• Start – You may decide the Width and Height as soon as each particle is emitted. The range is from (0 X 0) to (99999 X 99999).

• End – These two parameters set the Width and Height of each particle when it vanishes. The range is from (0 X 0) to (99999 X 99999).

Rotate

The particles rotate as long as you modify the settings in this group.

• Initial Angle – By setting the value in this box, each particle tilts clockwise in the angle of this value as being generated. The range is from 0 to 359 degrees.

• Angular Velocity – These settings keep each particle rotating individually in different velocity. You may set the range from 359 degrees to 359 degrees. A positive/negative number constrains the particles to rotate clockwise/counterclockwise. The larger the number is, the faster the particles rotate.
  The relationship of the Min and the Max follows the formula:
  Min <= Max.

Life (frame)

The parameters define how long each particle lives. You can make your particles disappear at random ages from Min to Max frames.

• Min – The least number of frames for each particle to live. The value can be set from 0 to Max.

• Max – The highest number of frames for each particle to live. The value can be set from Min to 99999.

Force

Gravity

• It creates a force field to pull particles in a fixed direction specified by three parameters. The strength of the field increases as the values move up. The speed of the particles are accelerating per unit of time.

• X – Particles are pulled along the X-axis. The range is from -99999 to 99999.

• Y – Particles are pulled along the Y-axis. The range is from -99999 to 99999.

• Z – Particles are pulled along the Z-axis. The range is from -99999 to 99999.

Wind

• It simulates the effect of wind on the particles. The particles increase their velocity along the direction you set. However, the speed is constant instead of accelerating per unit of time.

• X – Particles are blown along the X-axis. The range is from -99999 to 99999.

• Y – Particles are blown along the Y-axis. The range is from -99999 to 99999.

• Z – Particles are blown along the Z-axis. The range is from -99999 to 99999.