Transformation in game development is usually refers to linear algebra operations on points, vectors and matrices.

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How to work with edge Texture [duplicate]

Im not sure if i use the right terms, but im not able to find something to start with. Im trying to develop a little HTML5 game. I have a ground with a texture and now I want to make a surrounding ...
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1answer
684 views

OpenGL: Move camera regardless of rotation

For a 2D board game I'd like to move and rotate an orthogonal camera in coordinates given in a reference system (window space), but simply can't get it to work. The idea is that the user can drag the ...
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2answers
440 views

Transforming bounding spheres

When testing bounding spheres as part of the collision detection process, I'm using this method: public static BoundingSphere TransformBoundingSphere(Matrix m, BoundingSphere b) { var ...
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1answer
259 views

Transformation matrix that maps a window

I'm currently learning OpenGL at uni, and they give us questions to help us learn (these are not worth anything), however I'm stuck on this one question and would have to travel over an hour and a ...
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1answer
284 views

Drawing a missile relative to the ship

I'm drawing my ship by the following code and wanted to draw a missile at the tip of the ship, so that when I click spacebar it fires that missile. I don't know if what I'm doing is correct or not. Is ...
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1answer
535 views

Special relativity shader in GLSL

I'm trying to implement a GLSL shader which helps understanding special relativity Lorentz Transformation. Let's take two axis-aligned inertial observer O and O' . The observer O' is in motion w.r.t ...
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3answers
339 views

Inverting matrix then decomposing gives different quaternion than decomposing then inverting the quat

I'm getting different signs when I convert a matrix to quaternion and invert that, versus when I invert a matrix and then get the quaternion from it: Quaternion a = Quaternion.Invert(getRotation(m)); ...
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1answer
594 views

importing animations in Blender, weird rotations/locations

This is for the Blender 2.6 API. There are two problems: 1. When I import a single animation frame from my animation file to Blender, all bones look fine. But when I import multiple (all of the ...
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1answer
450 views

Optimizing hierarchical transform

I'm transforming objects in 3D space by transforming each vector with the object's 4x4 transform matrix. In order to achieve hierarchical transform, I transform the child by its own matrix, and then ...
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2answers
563 views

getting bone base and tip positions from a transform matrix?

I need this for a Blender3d script, but you don't really need to know Blender to answer this. I need to get bone head and tip positions from a transform matrix read from a file. The position of base ...
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1answer
557 views

Translate along local axis

I have an object with a position matrix and a rotation matrix (derived from a quaternion, but I digress). I'm able to translate this object along world-relative vectors, but I'm trying to figure out ...
2
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1answer
337 views

Transform 3D vectors between coordinate systems

I've got 6 points in 3D space: A,B,C,D,E,F, that represent 4 vectors. AB is perpendicular to AC and DE is perpendicular to DF. I need to find a transformation matrix M, that transforms AB to DE and ...
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2answers
280 views

how to transform child elements position into a world position

I'm making a 2d space game in Javascript with canvas. In this game there's a bunch of spaceships, positioned in world space, with turrets, positioned relative to their parent ships. These objects also ...
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1answer
496 views

Transform 3d viewport vector to 2d vector

I am playing around with 3d transformations and came along an issue. I have a 3d vector already within the viewport and need to transform it to a 2d vector. (let's say my screen is 10x10) Does that ...
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1answer
245 views

How do I draw shape distortion with a Texture2D in XNA?

Say I have a rectangular Texture2D object in XNA, and I draw it on the screen. How can I animate it so it slowly changes to a trapezoid shape, and then to a pentagon, etc. I have no idea what this ...
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2answers
5k views

Scaling Model in XNA, keep position

I am trying to create a little fun 3D game in XNA, but I am having some problems with scaling my models. I use models from random sites, so my battleship is for an example 10 times larger than my ...
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3answers
1k views

In Maya how do I convert trans, rot, scale data to a 4 x 4 transformation matrix?

I have been given the following Maya camera data: trans X: 1.542 trans y: 3.319 trans z: -1.821 rot X: 117.882 rot Y: 2.189 rot Z: 154.074 scale X: 1 scale Y: 1 scale Z: 1 What is the ...
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1answer
902 views

Translating local to global coordinates in ARToolkit / OpenGL

Ok, so I've tried reading over the other questions and something's just not clicking for me. I am working on an augmented reality application using ARToolkit, however it should just be straight ...