New: Raymarching Material

A new material has been added, the mat/raymarchingBuilder, which allows to use SDF (signed distance functions) to create complex shapes that can be raymarched, opening the door to more elaborate shaders.

New nodes

• gl/SDFContext: allows to combine an SDF and a material inside the mat/raymarchingBuilder
• gl/SDFMaterial: adds a material to an SDF inside the mat/raymarchingBuilder

And there are also a few additional SDF nodes, that can be used inside this material:

• gl/SDFPlane
• gl/SDFRoundBox
• gl/SDFTorus

Improvements

• sop/text: errors when parsing a font are now displayed by the node, instead of being silent errors.
• sop/fileSVG: add isCCW and noHoles options to add flexibility when parsing SVG files.
• event/raycast: fix gpu mode cursor position and fetch material when needed
• sop/objectsLayout: add row, rowWidthInner and rowWidthOuter attributes
• sop/copy: better use of default value in copy expression
• sop/sort: add random sorting mode

A new attribute type has been added. For now, it was possible to create vertex/point attributes, and also object attributes. Now, it is also possible to add a CoreGroup attribute. This attribute type has been added to the nodes sop/attribCreate, sop/attribDelete and sop/attribPromote.