MaxwellGrass

Description

This extension allows to generate grass on the top of meshes. It works as a object modifier plugin. Internally it creates blades and converts them to different grass primitives depending on the user parameters.

Example of how to create a MaxwellGrass object:

// If we don't need to call functions such as CgeometryModifierExtension::getProxyDisplayPoints() 
// (i.e for display purposes) 
// then it is possible to define procedural geometries or object modifiers 
// without loading extension dynamic libraries (.mxx files) 
// but a MXparamList object can be created and filled with the desired parameters.

Cmaxwell::Cobject mesh = pMaxwell->createMesh( ... );

// ...fill mesh parameters
MXparamList* grassParams = new MXparamList( "MaxwellGrass" );


float bladesDensity = 500.0; 
grassParams->setFloat( "Density", bladesDensity ); 

float length = 0.25; 
grassParams->setFloat( "Length ", length ); 

grassParams->setString( "Material", materialName );

//...etc..


object.applyGeometryModifierExtension( grassParams );

Parameters

Name	Type	Min	Max	Default	Description
"Material"	char*	--	--	--	Material name
"Density"	unsigned int	1	1e8	2000	Blades density (blades/m2)
"Density Map"	Cmap	--	--	--	Blades density map
"Length"	float	0.0	1e5	10.0	Blade length
"Length Map"	Cmap	--	--	--	Length density map
"Length Variation"	float	0.0	100.0	20.0	Length random variation (%)
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"FileName"

Name of the file that contains particles data. It is a NULL terminated string.

Example:

char* file = "/home/paco/Emitter01_00049.bin"; 
extParam->setString( "FileName", file );

"Radius Factor"

Multiplier for the particle radius that is read from the file. Can go from 0.00001 to 1000000 and the default value is 1.

Example:

float rFactor = 0.3f; 
extParam->setFloat( "Radius Factor", rFactor );

"MB Factor"

Multiplier to increase or decrease the amount of motion blur of the particles. Can go from 0.0 to 1000000.0. Default is 1.0.

Example:

float factor = 0.3f; 
extParam->setFloat( "MB Factor", factor );

"Shutter 1/"

Shutterspeed of the active camera. Affects the amount of motion of the particles. It is the inverse of the time the shutter is open.

Example:

float shutter = 125.f;
extParam->setFloat( "Shutter 1/", shutter );