Simply early-outing from denominators near zero was causing tangeants to be filled with garbage data. This alters the functionality to set a floor distance so the rest get's filled out properly.
Update README.md

Added T3D 3.5 and Project Manager 2.1 links.
Adds mViewport to guiTSControl in order to restrict render viewport to a sub-region of the control. This is particularly useful when using a guiTSControl as a container control, as it can restrict the render area to prevent overdraw or dedicate screen space to a panel
Revert "Adds mViewport to guiTSControl in order to restrict render viewport to a sub-region of the control. This is particularly useful when using a guiTSControl as a container control, as it can restrict the render area to prevent overdraw or dedicate screen space to a panel"

This reverts commit 0c307265a92753eeab4c36bb1d0b4b30976e1d9b.
Adds mViewport to guiTSControl to restrict render viewport to a sub-region of the control. This is particularly useful when using a guiTSControl as a container control, as it can restrict the render area to prevent overdraw or dedicate screen space to a panel"
Various GUI improvements & extensions: - Adds event delegates to all controls to improve ability to write GUI code in C++ - Adds mDataString to base control so all control can carry custom data - Adds code support for drag & drop - Adds autosizing option to popup controls to improve default spacing (otherwise, dropdown panel can float far below the dropdown control itself) - Adds optional frame panel rendering to tab controls - Adds several new GUI controls: - GuiIconSpawnerButtonCtrl spawns drag & drop icons. This is similar to the palette control - GuiMapCtrl supports a large, pannable image (which I have used for game maps - GuiGridCtrl is somewhat like the array control, but transparently supports both square and hex based grids of icons of arbitrary dimensions. I use it with the GuiMapCtrl to create pannable world maps - GuiMoveableCtrl is a moveable control. It's based on GuiDragAndDrop, but does not duplicate controls (as GuiDragAndDrop does) - GuiUnorderedIconCollection is intended to hold a collection of moveable controls. - GuiDecoration provides image rendering without event handling - GuiIconControl is icon button that also displays its text label. - GuiIconListCtrl is like the GuiTextListCtrl, but for icons - GuiIconPopupCtrl is like GuiPopupCtrl, but for icons.
-Removes GuiGridCtrl to fix missing dependencies -Removes references to sprites from GuiIconSpawnerButton to fix missing dependencies -Adds alignment & clipping to RectI