# Tagged Questions

0answers
52 views

### Uses for vector projection?

My previous question was solved by vector projection. Thus I spent some time studying it (Few helpful links: Interactive projection, short video and a longer video.). There were plenty of sites that ...
2answers
151 views

### 2D field of view detection inverted

I'm not sure if the title matches what I'm actually facing I'm trying to test if I can see a point is in my field of view (in the context of an NPC seeing in it's direction.) I know that: cos0 = ...
1answer
68 views

### Vector transform equation explanation

I'm trying to understand the maths of moving points in a 3d space by making a game written in C#. I'm looking at this wolfire blog series which explains some basic 3d maths. I've read the first two ...
2answers
2k views

### How to detect 2D line on line collision?

I'm a flash actionscript game developer who is a bit backward with mathematics, though I find physics both interesting and cool. For reference this is a similar game to the one I'm making: Untangled ...
3answers
526 views

### For normal mapping, why can we not simply add the tangent normal to the surface normal?

I am looking at implementing bump mapping (which in all implementations I have seen is really normal mapping), and so far all I have read says that to do this, we create a matrix to convert from ...
1answer
89 views

### Finding the angle of a line given 2 other lines

I'm trying to implement some 2D vehicle physics. For this to work I have 2 wheels attached to the body of the car. After doing some collisions checks I place the wheels at their new position. Say the ...