Experimental:Normalize POP

Summary

The Normalize POP can re-scale all your XYZ position values to be in the 0-1 range, and it can do that to any attribute.

It can output to any existing or new attribute.

It is much more powerful than that: It can convert any position into polar or cylindrical coordinates, i.e. latitude, longitude and radius expressed in 0-1 ranges.

It can put any of these normalized values into any component of a float2, float3 or float4 attribute.

After normalizing the values between 0 and 1, it can also Bias the numbers to be closer to 0 or to 1, it can apply a Lookup function to the normalized value (like applying an ease-in ease-out), then apply an Exponent (boosts or lowers but keeps 0 and 1 values the same), and then Re-range the 0-1 values to any other range.

Normalizing into polar or cylindrical form: When normalizing a polar radius for example, it finds the point that is farthest from 0, 0, 0 and then computes the distance of each point in comparison to the farthest point. So that normalizes the radius.

When normalizing a point into a longitude around the Y-axis, it gives a value from 0 to 1, where a value of 0 or 1 is on the “back side” along the -Z axis, and a longitude value of .5 is on the “front side” along the +Z axis.

Similarly for latitude around the Y axis, a value of 0 is at the south pole (in the western civilization way of thinking), a value of 1 is at the north pole, and a value of .5 means the point is around the equator.

A similar kind of thing is done for cylindrical normalization around the Y axis.

See also the Projection POP and the Texture Map POP.

About feeding components to Normalize and other POPs - If you put P(1) P(0) P(2) (or P.yxz), it will first swap the first 2 components (x and y) and pass that to the next stage where if you have Box X, it will be processing the original y coordinate (P(1)) of the input.

normalizePOP_Class

Parameters - Normalize Page

Attribute Class attrclass - ⊞ -

• Point point -

• Vertex vertex -

• Primitive primitive -

Input Attribute Scope inputattrscope -

Parameter Size parsize - ⊞ -

• 1 1 -

• 2 2 -

• 3 3 -

• 4 4 -

Aspect Correct aspectcorrect -

Replace Errors replace -

Error Value errval -

Mode mode - ⊞ -

• Mode mode0 -

• Mode mode1 -

• Mode mode2 -

Bias bias - ⊞ -

• Bias bias0 -

• Bias bias1 -

• Bias bias2 -

Lookup Curve lookupcurve - ⊞ -

• Lookup Curve lookupcurve0 -

• Lookup Curve lookupcurve1 -

• Lookup Curve lookupcurve2 -

Exponent exp - ⊞ -

• Exponent exp0 -

• Exponent exp1 -

• Exponent exp2 -

Map to Low tolow - ⊞ -

• Map to Low tolow0 -

• Map to Low tolow1 -

• Map to Low tolow2 -

Map to High tohigh - ⊞ -

• Map to High tohigh0 -

• Map to High tohigh1 -

• Map to High tohigh2 -

Output Attribute Scope outputattrscope - ⊞ -

• P P -

• N N -

• Color Color -

• Color.i012 Color.i012 -

• Tex Tex -

• PointScale PointScale -

• LineWidth LineWidth -

Override Automatic Attribute overrideautoattr -

New Attribute Type newattrtype - ⊞ -

• float float -

• double double -

• int int -

• uint uint -

• dir dir -

• dbl dir ddir -

New Attribute Number of Components attrnumcomps - ⊞ -

• 1 1 -

• 2 2 -

• 3 3 -

• 4 4 -

New Attribute Default Value newattrdefaultval - ⊞ -

• New Attribute Default Value newattrdefaultval1 -

• New Attribute Default Value newattrdefaultval2 -

• New Attribute Default Value newattrdefaultval3 -

• New Attribute Default Value newattrdefaultval4 -

Parameters - Common Page

Bypass bypass -

Delete Input Attributes delinputattrs -

Parameter Color Space parmcolorspace - ⊞ - Controls how all color parameters on this node are interpreted. The color values as treated as being in the selected color space, and are converted to the Working Color Space before they are used as part of the node's operation. Note that this does not change the color space of the node itself, as that is always in the Working Color Space.

• sRGB srgb - sRGB color space, with sRGB transfer function. Considered an SDR color space with respect to Reference White.

• sRGB - Linear srgblinear - sRGB color space, with linear transfer function. Considered an SDR color space with respect to Reference White.

• Rec.601 (NTSC) rec601ntsc - Rec.601 with NTSC primaries color space, with Rec.601 transfer function. Considered an SDR color space with respect to Reference White.

• Rec.709 rec709 - Rec.709 color space, with Rec.709 (same as Rec.2020) transfer function. Considered an SDR color space with respect to Reference White.

• Rec.2020 rec2020 - Rec.2020 color space, with Rec.2020 (same as Rec.709) transfer function. Considered an HDR color space with respect to Reference White.

• DCI-P3 dcip3 - DCI-P3 color space, with D65 white point and 2.6 gamma transfer function. Considered an HDR color space with respect to Reference White.

• DCI-P3 (D60) dcip3d60 - DCI-P3 "D60 sim" color space, with D60 white point, and 2.6 gamma transfer function. Considered an HDR color space with respect to Reference White.

• Display-P3 (D65) displayp3d65 - Display-P3 color space, with D65 white point, and sRGB gamma transfer function. Considered an HDR color space with respect to Reference White.

• ACES2065-1 aces2065-1 - ACES 2065-1 (also known as ACES AP0) color space, with a linear gamma transfer function. Considered an HDR color space with respect to Reference White.

• ACEScg acescg - ACEScg (also known as ACES AP1) color space, with a linear gamma transfer function. Considered an HDR color space with respect to Reference White.

• Passthrough passthrough - When selected, the color values will be used as-is in the operation, without any modification or attempt to convert them into the Working Color Space.

Parameter Reference White parmreferencewhite - ⊞ - When converting a parameter color value to the Working Color Space, this controls how it should be treated with respect to Reference White. If the Working Color Space is the same Reference White, then no adjustment is done. If they are different, then the Reference White level (brightness) of this color will be adjusted to the range expected by the Working Color Space. For example if the project is set to have a SDR Reference White of 120 nits, and the HDR Reference White is 80 nits, then a color of (1, 1, 1), which is 120 nits in the SDR color space, will be converted to be (1.5, 1.5, 1.5), which is 120 nits still in the HDR Working Color Space.

• Default For Color Space default - Will use either the SDR or the HDR Reference White, based on the color space selected.

• Standard (SDR) sdr - Will treat the Parameter Color Space as SDR for it's reference white value.

• High (HDR) hdr - Will treat the Parameter Color Space as HDR for it's reference white value.

Operator Inputs

• Input 0: -

Info CHOP Channels

Extra Information for the Normalize POP can be accessed via an Info CHOP.

Common Operator Info Channels

• total_cooks - Number of times the operator has cooked since the process started.

• cook_time - Duration of the last cook in milliseconds.

• cook_frame - Frame number when this operator was last cooked relative to the component timeline.

• cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.

• cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.

• cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.

• cooked_this_frame - 1 if operator was cooked this frame.

• warnings - Number of warnings in this operator if any.

• errors - Number of errors in this operator if any.

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Each SOP has a list of Points. Each point has an XYZ 3D position value plus other optional attributes. Each polygon Primitive is defined by a vertex list, which is list of point numbers.

A sequence of vertices form a Polygon in a SOP. Each vertex is an integer index into the Point List, and each Point holds an XYZ position and attributes like Normals and Texture Coordinates.

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A parameter in most CHOPs that restricts which channels of that CHOP will be affected. Normally all channels of a CHOP are affected by the operator. TOPs have Channel Mask, a similar feature.

An operator whose Bypass flag is set does nothing: All data going into its first input appears at its output unaffected.

Information associated with SOP geometry. Points and primitives (polygons, NURBS, etc.) can have any number of attributes - position (P) is standard, and built-in optional attributes are normals (N), texture coordinates (uv), color (Cd), etc.

A Link. The grey dashed lines between nodes is a Reference or Link that indicates one operator is getting data from another operator from any Operator Family.

The grey dashed lines between nodes is a Reference (or Link). A Reference is (1) a Parameter Reference, a parameter in an OP that is a name or path to another operator, (2) a Node Reference, an expression in a parameter or DAT script that contains the name or path of another operator, (3) a DAT Cell Reference or (4) a CHOP Channel Reference.

A Link or Reference is a dashed line between nodes that represent other data flowing between nodes. Examples are CHOP Exports, node Paths in parameters, and expressions in parameters referencing CHOP channels, DAT tables and other nodes. In contrast is a Wire that connects nodes in the same Operator Family.

A parameter reference can be setup between any two parameters by putting an expression in one parameter that refers to another parameter. This creates a Link between the two parameters such that when one changes, the other will change automatically (known in other software as a "constraint").

An Operator Family which operate on Channels (a sequence of numbers (Samples)) which are used for animation, audio, mathematics, simulation, logic, UI construction, and data streamed from/to devices and protocols.