Arithmetic, geometry, calculus, and all else which resolves the number-crunching necessary in a game. Math questions are those that deal with the formulae and calculations used by the game in various parts.
5
votes
2answers
206 views
Robust line of sight test on the inside of a polygon with tolerance
Foreword
This is a followup to this question and the main problem I'm trying to solve. My current solution is an hack which involves inflating the polygon, and doing most calculations on the inflated ...
5
votes
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 ...
5
votes
3answers
3k views
building a game for different resolution phones
I am starting some tests for building a game on the Android program.
So far everything is working and seems nice.
However I do not understand how to make sure my game looks correct on all phones as ...
5
votes
3answers
456 views
Determining the probability of a successful attack based on the equipped weapon?
Take this example, a player has a sword composed of the handle and a blade. Together, they generate a strength of X and that combination adds qualitative attributes (induce more damage to fire ...
4
votes
1answer
441 views
Re-create 2D side-on wave effect from Worms game
I'm trying to recreate the waves/water effect from Worms ( see here http://youtu.be/S6lrRqst9Z4?t=31s ) From what I understand its not actually a sprite, its procedurally generated by something like a ...
3
votes
4answers
1k views
non-linear interpolation
I have an object, and i want to interpolate its position between two points over a given time period; but i dont want it to be a linear interpolation. I'm not sure if i'm phrasing this right.
vector ...
2
votes
5answers
1k views
How can I make my score-based game addictive
Hey Guys ,
I need some ideas to make the USER interest in the game result. Other Wise he plays again to get high score . My game is a calculation game measure the speed of calculation of the user ...
9
votes
3answers
1k views
How to calculate the rotation resulting from ball bounce
Hey all, still working to incorporate more physics simulation into my game (mentioned HERE). Now having the ball successfully and quite realistically bouncing a surface it hits, I wanted to make the ...
4
votes
4answers
848 views
Physics timestep questions
I've got a projectile working perfectly using the code below:
//initialised in loading screen
60 is the FPS - projectilEposition and velocity are Vector3 types
gravity = new Vector3(0, ...
3
votes
1answer
301 views
Is it possible to procedurally place objects in a non-gridded game?
I'd like to implement procedural world generation, but I don't want it to look gridded or blocky, where everything is obviously placed on an integer grid.
I know that you can do this in gridded ...
2
votes
3answers
758 views
simplest way of making a sphere roll in a realistic way
rather than just moving a sphere across a plane, I want to make it roll like a ball. What is the simplest way of doing this? I assume it will have something to do with the circumference of the ball ...
11
votes
5answers
545 views
Is there a common word that encompasses handling of position, rotation, and scale together?
I'm looking for a name for my class that manipulates 4x4 matrices that handle position, rotation, and scale. Is there a common word that encompasses all three?
(I'm splitting the matrix math into its ...
7
votes
3answers
4k views
Sorting array of points in clockwise order
Is there such an algorithm to sort an array of 2D points in clockwise order?
I'm specifically dealing with right triangle in my case so only 3 points.
However I'm interested in knowing if such an ...
5
votes
1answer
953 views
Rotate object to face player
This is probably a simple vector question, but I'm not sure how to do it.
I have an object at vector position (ox,oy). Potentially every update, the user walks around the screen, and will be at ...
4
votes
5answers
1k views
Do game studios hire people based on their math knowledge alone?
I have very little programming skills outside of very basic levels of Java, but I have excellent math and science knowledge. I was wondering what I could offer any potential team if I were to go into ...
3
votes
3answers
190 views
Adding tolerance to a point in polygon test
I've been using this method which was taken from Game Coding Complete to detect whether a point is inside of a polygon. It works in almost every case, but is failing on a few edge cases, and I can't ...
3
votes
2answers
84 views
Need the co-ordinates of innerPolygon
Let say I have this diagram,
Given that i have all the co-ordinates of outer polygon and the distance between inner and outer polygon is d is also given. How to calculate the inner polygon ...
3
votes
1answer
407 views
How do you get an object to orbit around a certain point on a 2d plane?
I had a concept for a game come to me this morning but I can't figure out how I'd go about implementing the movement.
The general idea involves the left and right controls causing a sprite to go ...
2
votes
3answers
1k views
How do I shoot bullets towards the mouse in a top down shooter?
I have a formula for pointing my main character of the game towards the mouse, and it gets the angle he needs to be turned to point towards the mouse. But how do I get the bullets from the gun to use ...
2
votes
1answer
324 views
How to linearly transform vertices for large coordinate systems
Alright, so I'm working on a space game and well, I want it to have a lot of space! So I need a large coordinate system and for my rendering pipeline to not suffer from "vertex jittering" due to ...
1
vote
1answer
101 views
Canvas isometric translations to integer coordinates
I'm creating a canvas based game with an isometric playing board. I use the following transformations to get my square tiles to render on the screen:
'applyViewportTransformation' : function() {
...
1
vote
2answers
440 views
Rotate 3D cube so nearest side is facing user
How do I figure out the new angle and rotation vectors for the most visible side of the cube?
Why: The user can rotate cube, but when finished I'd like the cube to snap to a side facing the user.
...
1
vote
1answer
860 views
Zooming to point of interest
I have the following variables:
Point of interest which is the position(x,y) in pixels of the place
to focus.
Screen width,height which are the dimensions of the window.
Zoom level which sets the ...
1
vote
1answer
149 views
Anybody remember this webpage? [closed]
I remember visiting a webpage some time ago (1 year ago maybe)
It contained many java applets, describing how certain mathematical functions like sin, cos, arcsin, exp would make an object move, with ...
0
votes
1answer
260 views
Rotation matrices from Quaternion.Identity and -Quaternion.Identity are the same?
If I create a rotation matrix from an identity quaternion then it is the same as a creating it from a negative identity quaternion
Matrix m0 = ...
0
votes
1answer
1k views
The normal vector to a plane ax+by+cz+d=0?
I am calculating the normal vector to a plane ax+by+cz+d=0
According to the book:
The normal vector N is often normalized to unit length because in that case
the equation
d = N ⋅Q + D
gives the ...
