The curves tag has no wiki summary.
13
votes
3answers
317 views
How do you calculate the nearest point on 2 curves?
Given the points of a line and a quadratic bezier curve, how do you calculate their nearest point? .... Similarly, given the points of 2 curves, how do you get the nearest point?
11
votes
8answers
845 views
Converting a 2D curve into points for data storage
I’ve created an algorithm which converts any curve i.e. path into minimum number of points so that I can save it into a file or database.
The method is simple: it moves three points in equal steps ...
8
votes
2answers
283 views
How do you calculate if 2 lines are facing toward or away?
Given the 4 points describing 2 line segments, how do you calculate if line A is towards or away from line B?
The 2 lines have a fixed length, and can be measured as distance from x1/y1 to x2/y2.
6
votes
2answers
163 views
How do you calculate if a line is facing a curve?
Given the 2 points describing a line segment, and the 3 points describing a quadratic bezier curve, how do you calculate if the line is facing towards or away from the curve?
The line has a fixed ...
5
votes
2answers
293 views
How to create a curve from a set of points that passes through said points?
What is the best way to create a smooth curve path from a set of points? For example:
I've seen Bezier curves before, but those try to smooth out the path from the set of points, like this:
5
votes
3answers
502 views
Best system for creating a 2d racing track
I am working a 2D racing game and I'm trying to figure out what is the best way to define the track.
At the very least, I need to be able to create a closed circuit with any amount of turns at any ...
5
votes
1answer
484 views
How to implement curved movement while tracking the appropriate angle?
I'm currently coding a 2D top-down car game which will be turn-based. And since it's turn-based, the cars won't be controlled directly (i.e. with a simple velocity vector that adjusts its angle when ...
4
votes
1answer
749 views
making a box2d body move along a Bezier curve/ arc path
I have been trying to make a box2d body move along a Bezier curve/ arc path. Most of the posts I've seen recommend an approach of manipulating SetLinearVelocity and SetTransform to arrive at an ...
3
votes
1answer
233 views
How to compute the 2D equations of 3D circular arcs?
I'd like to obtain these equations for the ellipses produced by the perspective projections of (3-dimensionally transformed) circles.
This is useful for rendering in 2D contexts which provide curve ...
2
votes
2answers
573 views
Implementing a sine using a bezier curve
I'm developing a 2D game using Cocos2d-x.
Is possible to use CCBezierTo to parameterize a sine function?
2
votes
3answers
297 views
Tessellating to a curve?
I'm creating a game engine, and I'm trying to define a 3D model format I want to use. I haven't come across a format that quite does what I want.
My game engine assumes a shader model 5+ environment. ...
2
votes
0answers
159 views
Catmull Rom Spline - Constant Speed
Given the equations found in the answer here:
Determine arc-length of a Catmull-Rom spline
How would one A) Apply this to a 3D Catmull-Rom Spline, and B) write A out programmatically (for the math ...
1
vote
1answer
228 views
How to generate closed curve?
How can I do that? I can generate simple beziers, but how can I generate a closed curve like this:
http://www.youtube.com/watch?feature=endscreen&NR=1&v=hlDYJNEiYvU
1
vote
2answers
207 views
How to make a gui button follow a path after a touch?
I would like a button in my gui menu to follow a specific path if we selected it, I am wondering how I could do it: if we touch the button, then it can only move on the specific path, it is an arc ...
1
vote
2answers
338 views
How would I move an object using its velocity on a closed curve?
I want that an object follows a path, in Peggle game there are some pegs that have
movement in a closed path. How can i get the same result? I guess that I can use parametric curve but I need use the ...
1
vote
0answers
247 views
Bezier curve sample code on touches moved
i am searching for any sample code to draw bezier curve by using touches, if any one have links or sample code please help me. i am developing the game like flight control in that i have to move my ...
0
votes
1answer
203 views
How do I detect the intersection of a curve with itself?
I'm developing a game in which the player can draw a line. I want to detect if that line intersects with itself. How would I do this?
0
votes
0answers
51 views
Going from point a to b through a curve using “gravity” [duplicate]
I have enemies and when they die they spawn an energy ball with a given velocity. I want to move this ball to the player using "gravity" to create a curved path. I have a version of the function but ...
0
votes
0answers
110 views
GameSalad | Draw lines and arcs
I'm new to GameSalad.
Can lines and arcs be drawn in GameSalad, respond to touch at a point, and be shrunk along their path?
