-1
votes
0answers
66 views

best app store owner, which deals with payoneer, to host and sell an XNA game [duplicate]

I have developped a XNA game, and I'd like to sell it. I'd like to know what is the best free way to put the game as online appstore ? I need an app store owner, which deals with payoneer Thank you ...
0
votes
1answer
55 views

What is the optimal way to handle matrix internal data storage for interop with native graphics apis?

I'm writing a managed (c#) game engine and have stumbled on a bit of a crossroads in design/implementation regarding matrix types. Matrix types need to be optimized for marshaling to native graphics ...
0
votes
2answers
149 views

How do I create a knockback-movement?

I am a web developer new to game development, and with limited math knowledge. I am writing a character movement controller in Unity. The game has an isometric Diablo-like camera. The character moves ...
1
vote
1answer
75 views

Predicted target location [duplicate]

I'm having an issue with calculating the predicted linear angle a projectile needs to move in to intersect a moving enemy ship for my 2D game. I've tried following the document here, but what I've ...
1
vote
1answer
31 views

Predicted target location

I'm having an issue with calculating the predicted linear angle a projectile needs to move in to intersect a moving enemy ship for my 2D game. I've tried following the document here, but what I've ...
0
votes
1answer
112 views

Calculating ball trajectory in Pong

I'm making a Pong game and I'm just looking for a simple way to calculate a straight travelling path for the ball based on the angle of the ball. How would I go about implementing something like this? ...
0
votes
1answer
109 views

Projecting a light onto a quad

I need to project the light onto the quad and use its value for translating the vertices. I'm currently having 6 vertices, two quads, The points are A X C B Y D Point X, Y are coming from two ...
0
votes
0answers
211 views

Script to intelligently move aircraft using curves [Unity]

I am trying to code a script to move an aircraft entity from point A to point B and at some point in the middle of moving have the aircraft forward vector face Point C (to fire a missile at an enemy ...
2
votes
1answer
250 views

C# - Separating Overlapping Rectangles

I'm trying to separate an arbitrary number of randomly sized rectangles, while still keeping them snapped to the grid, and somewhat packed together nicely. The goal is to start with something like ...
0
votes
0answers
118 views

Calculating intersection of line segment with view frustum

I want to calculate the intersection of a line segment with the view frustum. Here's what I tried so far. The code works perfectly when the look direction vector is orthogonal to the line. E.g. ...
-2
votes
1answer
136 views

Lerp speed or lerp time [closed]

Am I right about the fact that lerping can be done over a set period of time or at a speed which will continue until the target is reached? How are the formulas for the two? Is it something like ...
1
vote
1answer
198 views

How do I find two points at an angle on opposite sides of a circle?

With reference to my previous question: I'm using micklh's answer, which works perfectly. However, it calculates the gradient based on two points, a starting point and an ending point. I want to ...
2
votes
1answer
369 views

Day and Night Cycles and Skybox Blending

I've been working on adding day/night cycles and random weather to my project using the Neoaxis engine. The day/night cycles itself is pretty simple, just rotating the "sun" light around the Y axis. ...
1
vote
3answers
236 views

Code to generate a color gradient within a texture using a diagonal line

I want to generate a color gradient between two colors from x1,y1 to x2,y2. I'm unsure how to do this though. I can use Color.Lerp to get all of the color steps, but the problem is that I don't ...
1
vote
2answers
97 views

margin of error trying to check if a point lays on line

Working with floating point values it is as easy as breathing to run on approximation errors by comparing quantities which should be the same. I want to know if there is a way built in some MSDN (or ...
0
votes
2answers
52 views

Percentages for different platform generation [duplicate]

I have a level manager, which creates levels and levels create platforms. Levels can contain a variety of platforms. I dont really understand how I can say: I want a 10% of one platform being ...
7
votes
3answers
366 views

Slerping rotation mirrors

I rotate my game character to watch at the target using the following code: transform.rotation = Quaternion.Slerp(startQuaternion, lookQuaternion, turningNormalizer*turningSpeed/10f) ...
-1
votes
2answers
116 views

Velocity deacceleration working incorrectly

Basicly, I've tried to code velocity into my game, which works sort of. The deaccelaration works sort of, but not correctly. The problem is, that the positive values, decreases just fine and dandy to ...
1
vote
2answers
313 views

Rotate around the centre of the screen

I want my camera to rotate around the centre of screen and I'm not sure how to achieve that. I have a rotation in the camera but I'm not sure what its rotating around. (I think it might be rotating ...
1
vote
2answers
150 views

Rotating sprite 180 deg

I should say first, that I have the rotation down. Its just that I want my square to rotate exactly 180 degrees. Currently, it will rotate but it will rotate but by less each jump. So after several ...
4
votes
3answers
272 views

Matrix multiplication - Scene Graphs

I wrote a MatrixStack class in C# to use in a SceneGraph. So, to get the world matrix for an object I am suposed to use: WorldMatrix = ParentWorld * LocalTransform But, in fact, it only works as ...
3
votes
3answers
1k views

Getting correct angles between Vector3s

I'm working on a project where you can draw lines between points. You select one point and drag the mouse onto another point and a line is drawn between them. The line itself is a 3d object which is ...
2
votes
2answers
339 views

Unproject mouse position to tile — extremely jumpy position?

I'm trying to unproject the mouse position to get the position on the X-Z plane of a ray cast from the mouse. The camera is fully controllable by the user. Right now, the algorithm I'm using is... ...
2
votes
4answers
1k views

Simulating a sine wave/oscillating pattern for enemies

I'm creating a simple top down shooter, right now I have an enemy which simply follows the player. I'd like to change things up and have the enemies move towards the player but in a wave like motion. ...
2
votes
2answers
257 views

How to offset particles from point of origin

Hi I'm having troubles off setting particles from a point of origin. I want my particles to spread out after a certain radius from a the point of origin. For example, this is what I have right now: ...
3
votes
2answers
393 views

Calculating the correct particle angle in an outwards explosion

I'm creating a simple particle explosion but am stuck in finding the correct angle to rotate my particle. The effect I'm going for is similar to this: Where each particle is going outwards from the ...
-1
votes
1answer
567 views

Breakout… Getting the ball reflection X angle when htitting paddle / bricks [duplicate]

Im currently creating a breakout clone for my first ever C# / XNA game. Currently Ive had little trouble creating the paddle object, ball object, and all the bricks. The issue im currently having is ...
3
votes
1answer
383 views

Finding closest object to a location within a specific perpendicular distance to direction vector

I have a location and a direction vector indicating facing, I want to find the closest object to that location that is within some tolerance distance (perpendicular distance) to the ray formed by the ...
1
vote
1answer
906 views

Interpolation between two 3D points?

I'm working with some splines which define a path a character follows (you can see a gameplay video here to get a better understanding of what's going on: http://www.youtube.com/watch?v=BndobjOiZ6g). ...
3
votes
2answers
378 views

Tessellating/Subdividing a quad

I am creating a quad that starts as a single quad, then divides itself multiple times (from 1 -> 4 -> 16 -> 64 -> 256 etc) but I have encounted an issue. When I get to 64 sub divisions only 16 quads ...
3
votes
1answer
388 views

Confused about order of operation when using a Matrix in XNA, C#

Here are two different pieces of code This is what I started with Vector2 hold = Vector2.Transform(pos1, mat1); Matrix inv = Matrix.Invert(mat2); Vector2 pos2 = Vector2.Transform(hold, inv); And ...
2
votes
1answer
317 views

Moving two objects proportionally

I'm trying to move two objects away from each other at a proportional distance, but on different scales. I'm not quite sure how to do this. Object A can go from position 0.1 to 1. Object B has no ...
1
vote
1answer
1k views

Line segment / circle intersection - X value seems wrong?

Major Edit I'm making a Breakout clone, and having difficulty with collision detection between a circle and line segment. Apologies, my earlier question was a result of frustration and no sleep :) ...
8
votes
1answer
6k views

Get position of point on circumference of circle, given an angle?

I would like to know how to get a specific point on the circumference of a circle, given an angle. The diameter of the circle is 1, and the center point of the circle is { X: 0.5, Y: 0.5 }.
3
votes
3answers
4k views

Getting the angle between two objects?

I have a set of boxes which create a sort of path, they don't intersect very smoothy and to help that process I'm trying ot find a way to get an angle between them that can make it easier to generate ...
1
vote
1answer
179 views

An ellipse outside two points?

I am trying to generate an ellipse outside two points (two-dimensional vectors). Is there a formular for that, or a cool way of doing that in C# XNA? What I am trying to do is have a particle circle ...
3
votes
4answers
517 views

Vary speed of enemy smoothly

Hey. I'm trying to create an enemy that travels at a speed s on screen but I'm having trouble with trying to make the speed vary in a smooth motion. Basically, I can get the enemy to move at a ...
5
votes
1answer
1k 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 ...
9
votes
1answer
1k views

Adding air drag to a golf ball trajectory equation

I'm developing a 2D golf game in VB.NET 2005, but I am stuck on how to implement air or wind drag that should affect the ball. Already I have these equations for projectile: Vo ...
2
votes
1answer
489 views

Calculating camera zoom value (top-down)

I need some help in 'camera maths'. I have a birds eye view of two characters. One character is static and the other can move. I would like the camera to always show both characters in full and, in ...
5
votes
2answers
915 views

Arrays for a heightmap tile-based map

I'm making a game that uses a map which have tiles, corners and borders. Here's a graphical representation: I've managed to store tiles and corners in memory but I'm having troubles to get ...
3
votes
3answers
964 views

Restrict movement within a radius

I asked a similar question recently but now I think I know more about what I really want to know. I can answer my own question if I get to understand this bit. I have a situation where a sprite's ...
4
votes
2answers
1k views

snapping an angle to the closest cardinal direction

I'm developing a 2D sprite-based game, and I'm finding that I'm having trouble with making the sprites rotate correctly. In a nutshell, I've got spritesheets for each of 5 directions (the other 3 come ...
3
votes
1answer
266 views

Correct Blitting 2 surface problem

this is a graphics/math problem. Consider this 2 sprite / surface As you can see they are a tank and his gun turret. Now, i manage the turret rotation, and it works, and, also, the rotation of ...
22
votes
3answers
3k views

Is there a faster sine function?

I am working on generation 3d perlin noise. The C# Math library seems like overkill for what I need since most of its functions use double percision. I use Math.Sin() in several places to generate the ...
5
votes
1answer
847 views

Zooming and panning a camera simultaneously causes a swooping effect

In a 2d game, I have a basic camera class. The guts of the class creates a transformation matrix that is later passed to the Begin() method of a SpriteBatch. The transformation is done like this: ...