Texture Map POP

Summary

The Texture Map POP creates the Tex attribute which is used to apply texture maps to surfaces, or to position procedurally-generated textures to surfaces.

The Tex attribute is a float3 3-component attribute. It can appear as a point attribute or a vertex attribute. It is created by all the generator POPs like the Plane POP, Grid POP, Sphere POP, Rectangle POP, Box POP etc., but Tex can also created with the Texture Map POP.

There are various projection methods, each useful depending on the type of geometry it is being applied to and its use-case.

Equirectangular Inside and Outside is a spherical polar longitude/latitude mapping used on vertices, used in VR, either to be viewed from the inside of a sphere or outside.

Domes require the mapping type Equidistant Azimuth, a fish eye projection. Projection mapping uses perspective from camera simulating what is "seen" from the position of a projector.

Triplanar Coordinates is a type that generates 3 sets of texture coordinates (3 attributes) used to map 1 texture onto an object but is a blend of 3 orthographic projections onto 3 sides of an object.

There is nothing special about the Tex attribute - any attribute can be used by a Material. The Normalize POP and the Projection POP produce attributes that can be used with a material, like doing orhtographic scaled projections, or spherical/cylindrical projections.

Some materials require multiple texture coordinates, which can be created with any of these methods in creating Tex2, Tex3, etc. and provided to the materials.

Note: In SOPs this was similar to the use of the uvw attribute for texture coordinates.

See also PBR MAT, Phong MAT, Normalize POP and the Projection POP

texturemapPOP_Class

Parameters - Texture Page

Primitive Group group - Optional primitive group to select.

Transform Input Texture Coord transforminput - Enable transforms on the input texture coordinates.

Input Texture Coord Attribute inputtexattr - Input Texture coordinate attribute to transform.

Position Attribute posattr - Projected position attribute.

Projection Axis axis - ⊞ - Transform axis used for the projection

X Axis x -

Y Axis y -

Z Axis z -

FOV Angle fov - Determines the camera's field of view angle.

Center Mode centermode - ⊞ - For fisheye projection, whether the projection will use the bounding box center or a manually specified center.

Bounding Box Center bbcenter -

Manual manual -

Center center - ⊞ - For fisheye projection, when center is manual, the position of the center to use for the projection.

Center centerx -

Center centery -

Center centerz -

Camera camera - Specify the camera component.

Camera Aspect cameraaspect - ⊞ - The aspect ratio for the projection.

Camera Aspect cameraaspectx -

Camera Aspect cameraaspecty -

Apply to applyto - ⊞ - Where to apply the texture coordinates.

Natural location natural -

Point texture point -

Vertex texture (fix seams) vertex -

Scale s - ⊞ - UV transform scaling factor.

Scale su -

Scale sv -

Scale sw -

Offset offset - ⊞ - Adds an offset to the resulting texture mapping.

Offset offsetu - Adds an offset to the texture map coordinate.

Offset offsetv - Adds an offset to the texture map coordinate.

Offset offsetw - Adds an offset to the texture map coordinate.

Rotate angle - Rotates the texture coordinate the specified value.

Fix Face Seams fixseams - Enable attempting to correct texture continuity at face seams.

Output Attribute Scope outputattrscope - ⊞ - Name of attribute to output (can choose components of attribute), can choose from menu.

P P -

N N -

Color Color -

Color.rgb Color.rgb -

Tex Tex -

PointScale PointScale -

LineWidth LineWidth -

Override Automatic Attribute overrideautoattr - Whether to override the kind of attribute automatically created based on the POP input and parameters. Allows to specify manually the type and number of components of the new attribute.

Attribute Type attrtype - ⊞ - The output attribute's data type, default float.

float float -

double double -

int int -

uint uint -

Color color -

Color (double) dcolor -

Direction dir -

Direction (double) ddir -

Components attrnumcomps - ⊞ - The number of components in the new custom attribute.

1 1 -

2 2 -

3 3 -

4 4 -

Default Value attrdefaultval - ⊞ - Default values of the output attribute components if they cannot be computed.

Default Value attrdefaultval0 - Default value(s) of the attribute.

Default Value attrdefaultval1 - Default value(s) of the attribute.

Default Value attrdefaultval2 - Default value(s) of the attribute.

Default Value attrdefaultval3 - Default value(s) of the attribute.

Texture Method texmethod - ⊞ - Determines how the texture coordinates are applied.

XYZ Normalized (Point) xyznorm -

XYZ Position (Point) xyzposition -

Cylindrical (Vertex) cylin -

Face (Vertex) face -

Face Fit Outside (Vertex) facefitoutside -

Equirectangular Inside (Spherical Polar) (Vertex) equirectangularin -

Equirectangular Outside (Spherical Polar) (Vertex) equirectangularout -

Equidistant Azimuth (Fish Eye) (Point) equiazimuth -

Perspective From Camera (Point) persp -

Triplanar Coordinates (Point) triplanar -

Parameters - Transform Page

Transform Order xord - ⊞ - Sets the overall transform order for the transformations.

Scale Rotate Translate srt -

Scale Translate Rotate str -

Rotate Scale Translate rst -

Rotate Translate Scale rts -

Translate Scale Rotate tsr -

Translate Rotate Scale trs -

Rotate Order rord - ⊞ - Sets the order of the rotations within the overall transform order.

Rx Ry Rz xyz -

Rx Rz Ry xzy -

Ry Rx Rz yxz -

Ry Rz Rx yzx -

Rz Rx Ry zxy -

Rz Ry Rx zyx -

Translate t - ⊞ - Translate the texture coordinates in the three axes.

Translate tx -

Translate ty -

Translate tz -

Rotate r - ⊞ - Rotate the points around the corresponding X, Y and Z axes. Angles are given in degrees.

Rotate rx -

Rotate ry -

Rotate rz -

Scale scaletwo - ⊞ - UV transform scaling factor.

Scale scaletwox -

Scale scaletwoy -

Scale scaletwoz -

Pivot p - ⊞ - The pivot point for the transform rotates and scales.

Pivot px -

Pivot py -

Pivot pz -

Parameters - Common Page

Bypass bypass - Pass through the first input to the output unchanged.

Free Extra GPU Memory freeextragpumem - Free memory that has accumulated when output memory has grown and shrunk.

Delete Input Attributes delinputattrs - Only output which attributes you specify in this POP - helps isolate attributes into a separate branch.

Operator Inputs

Input 0: -

Info CHOP Channels

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

Common POP Info Channels

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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