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  • Why do 3D engines primarily use triangles to draw surfaces?
    For example: A square is two triangles that are on the same plane, if all the points that make up the square are co-planar It takes a lot of calculations to make sure all the points are co-planar, thus all polygons that are greater than 3 points are pre-calculated by decimating them into triangles and tested to make sure all the points are co-planar once, instead of on every frame that gets
  • geometry - How do CSS triangles work? - Stack Overflow
    Different approach: CSS3 triangles with transform rotate Triangular shape is pretty easy to make using this technique For people who prefer to see an animation explaining how this technique works here it is : Link to the ANIMATION : How to make a CSS3 triangle And DEMO : CSS3 triangles made with transform rotate
  • How do I Z-sort triangles for a 3D engine? - Stack Overflow
    Each of the triangles is in front of one triangle and behind the other I had to do some very simple tricks in inkscape just to create this diagram It is not hard to arrange polygons in 3D such that you have a cycle in the "in front of" graph To solve this problem your algorithm would need the ability to subdivide the triangles to break the
  • css - What characters can be used for up down triangle (arrow without . . .
    As others also suggested, you can also create triangles with HTML, either with CSS borders or SVG shapes or even JavaScript canvases CSS div{ width: 0px; height: 0px; border-top: 10px solid black; border-left: 8px solid transparent; border-right: 8px solid transparent; border-bottom: none; } SVG
  • Number of right isosceles triangles in a rectangular grid
    There are 0 (zero) right isosceles triangles in a rectangular grid Perhaps you mean the number of right isosceles triangles that can be formed from the points in a rectangular grid - but you need to show some effort Also, given that it's a rectangular grid, not a square one, are the grid points spaced uniformly along either axis, both, or none?
  • python - For While Loops to make *-triangles - Stack Overflow
    Edit: Turns out, I only noticed half of my problem The code I wound up using, here, makes the two triangles I need, but stacks them one below the other What I'm having trouble with now is making them appear side-by-side, like an M shape
  • Detection of Triangle Collision in 2D Space - Stack Overflow
    6 line intersection and 4 point-in-triangle: If you draw it out, you can see that you can completely ignore one side of one of the triangles for line intersection and then just do all the other triangles points for point-in-triangle Because line intersection and barycentric are about the same speed, this isn't much better than #1
  • Algorithm To Find Minimum Distance Between Two Triangles
    The normals for both triangles are parallel to the X-Y plane The minimum distance between them is probably the distance between the two points I've plotted (H and G) Assuming the triangles are not co-planar, I know that one of the points representing the smallest distance between the two triangles must lie on either a vertex or along an edge for one of the triangles
  • Total number of possible triangles from n numbers
    The problem with these solutions is that they produce count same triangles multiple times (e g triplets 3<4+5, 4<3+5 and 5<3+4 describe the same triangle but are all counted) Once you try to eliminate duplicate triangles, you instantly hit O(nnn) complexity –





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