Object Hierarchy | Related C++ Class: CColor
v1.0
This object represents an RGBA color. The RBGA component values
are stored as double precision numbers.
Note: if a component value is greater than a signed,
single-precision value, the component value is interpreted as a
negative value. In most cases, the component values are normalized
to the range 0 to 1. TrianglePoint.Color is an exception,
and returns values in the range 0 to 255.
Other Softimage objects and properties store colors
differently:
- Shaders and Softimage objects have separate Parameter objects for
each color component (for example,
"Scene_Material.Phong.diffuse.Green"). These component values are
normalized and use double precision.
- Vertex Color properties store color component values as arrays of
doubles inside a ClusterProperty.
- Wireframe colors are encoded as 10-bit values (0 to 1023), with
the least significant bit ignored. Each of the R,G,B channels is 3
bits (a number from 0 to 7), and the wireframe color is encoded as
B2|B1|B0|G2|G1|G0|R2|R1|R0|0|
/*
This example shows how to create a tool for changing the
wireframe color of an object and how to map an RGB color to
a wireframe color.
*/
CreateColorizeTool();
function CreateColorizeTool()
{
var color_tool = ActiveSceneRoot.Properties("ColorizeTool");
if (!color_tool)
{
var color_tool = ActiveSceneRoot.AddCustomProperty( "ColorizeTool" );
var wirecolor = color_tool.AddParameter( "wirecolor", siInt4 );
wirecolor.ReadOnly = true;
var r = color_tool.AddParameter( "R", siDouble );
var g = color_tool.AddParameter( "G", siDouble );
var b = color_tool.AddParameter( "B", siDouble );
var a = color_tool.AddParameter( "A", siDouble );
var layout = color_tool.PPGLayout ;
layout.AddRow();
var item = layout.AddItem( "wirecolor", "wirecolor" );
item.SetAttribute( "NoSlider", true );
layout.AddButton( "ColorizeObject", "Colorize object" );
layout.EndRow();
layout.AddGroup( "Color" );
item = layout.AddColor( "R", "",true );
item.SetAttribute( "NoLabel", true );
layout.EndGroup();
layout.Language = "JScript" ;
layout.Logic =
ColorizeTool_R_OnChanged.toString() +
ColorizeTool_G_OnChanged.toString() +
ColorizeTool_B_OnChanged.toString() +
RGBToWireframeColor.toString() +
ColorizeTool_ColorizeObject_OnClicked.toString();
layout.SetAttribute( "LogicPrefix", "ColorizeTool_" ) ;
}
InspectObj( color_tool, "Colorize Tool", "", siLock );
}
function ColorizeTool_R_OnChanged()
{
PSet.wirecolor.ReadOnly = false;
PSet.wirecolor.Value = RGBToWireframeColor(PSet.R.Value,PSet.G.Value,PSet.B.Value);
PSet.wirecolor.ReadOnly = true;
}
function ColorizeTool_G_OnChanged()
{
PSet.wirecolor.ReadOnly = false;
PSet.wirecolor.Value = RGBToWireframeColor(PSet.R.Value,PSet.G.Value,PSet.B.Value);
PSet.wirecolor.ReadOnly = true;
}
function ColorizeTool_B_OnChanged()
{
PSet.wirecolor.ReadOnly = false;
PSet.wirecolor.Value = RGBToWireframeColor(PSet.R.Value,PSet.G.Value,PSet.B.Value);
PSet.wirecolor.ReadOnly = true;
}
function ColorizeTool_ColorizeObject_OnClicked()
{
var color = PSet.wirecolor.Value;
var o = null;
var siRMB = 0;
var button = -1, modifier;
while ( o==null && button != siRMB )
{
Application.StatusBar ="Pick object to colorize";
var rtn = PickObject( "Select object", "");
o = rtn.Value("PickedElement");
button = rtn.Value("ButtonPressed");
modifier = rtn.Value("ModifierPressed");
}
if ( button == siRMB )
return;
var display = o.Properties("Display");
if (display.isa(siSharedPSet))
{
display = MakeLocal( display, siNodePropagation )(0);
}
display.wirecol.Value = color;
return color;
}
// Convert wireframe color index to double-precision RGB color
function WireframeColorToRGB(lWireframeColor)
{
var aColor = new Array(3);
aColor[0] = ((lWireframeColor >>> 1) & 0x7)/7;
aColor[1] = ((lWireframeColor >>> 4) & 0x7)/7;
aColor[2] = ((lWireframeColor >>> 7) & 0x7)/7;
return aColor;
}
// Convert double-precision RGB color to wireframe color index
function RGBToWireframeColor(dR,dG,dB)
{
// Convert RGB to wirecolor
var wirecolR, wirecolG, wirecolB;
wirecolR = (Math.round(dR * 7)) << 1
wirecolG = (Math.round(dG * 7)) << 4
wirecolB = (Math.round(dB * 7)) << 7
return wirecolR | wirecolG | wirecolB;
}
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set oSpot = GetValue("Scene_Root").AddLightRig("Spot").Light
set oColor = oSpot.OGLLight.Color
Application.LogMessage "color: " & oColor.Red & ", " & oColor.Green & ", " & oColor.Blue & ", " & oColor.Alpha
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