This chooses the particle tool.
         
          
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            These are the descriptions of the items in the  options window.
            
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                     The name helps you identify the object in the . If you don’t enter a name, the particle object receives a default name such as particle1. 
                      
 
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                     (For nParticles only.) Specifies which Maya Nucleus solver the nParticle object belongs to. Select a solver from the drop-down list (existing Maya
                        Nucleus solvers are listed), or select to create a new Maya Nucleus solver for the new nParticle object.
                      
 
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                     Influences the motion of particles whose velocity and acceleration attributes are controlled by dynamic effects. See General Control Attributes.
                      
 
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                     Enter the number of particles you want to create per mouse click 
                      
 
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                      If you choose a number greater than 1 for , you can distribute particles randomly in a spherical region where you click. To choose a spherical region, set  to a value greater than 0.
                      
 
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                     When this option is selected, drag the mouse to sketch a continuous stream of particles.
                      
 
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                     This sets the pixel spacing between particles. A value of 0 gives you nearly a solid line of pixels. The higher the value,
                        the more space between the pixels.
                      
 
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                     Only active when creating a particle grid. Sets the spacing (in units) between particles in the grid. 
                      
 
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                     Choose with cursor, to set the volume with your cursor, or with text fields, to set the grid co-ordinates manually.
                      
 
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                     The x, y, z co-ordinates of the lower left corner of the 3D particle grid.
                      
 
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                     The x, y, z co-ordinates of the upper right corner of the 3D particle grid.