A branch of mathematics that studies triangles and the relationships between their sides and the angles between these sides.
11
votes
1answer
527 views
How can I draw an arrow at the edge of the screen pointing to an object that is off screen?
I am wishing to do what is described in this topic:
http://www.allegro.cc/forums/print-thread/283220
I have attempted a variety of the methods mentioned here.
First I tried to use the method ...
5
votes
3answers
490 views
How can I make a character move forward in a certain direction?
I have an entity class which is updated every game tick. Let's just assume said entity moves forward constantly. What i want to know is, how can i make it so that i can give an angle to a function and ...
3
votes
1answer
256 views
Spherical to Cartesian Coordinates
Well I'm reading the Frank's Luna DirectX10 book and, while I'm trying to understand the first demo, I found something that's not very clear at least for me. In the updateScene method, when I press A, ...
3
votes
2answers
411 views
How to rotate camera centered around the camera's position?
Currently I am using gluLook at like so:
gluLookAt(position.x, position.y, position.z,
viewPoint.x, viewPoint.y, viewPoint.z,
upVector.x, upVector.y, upVector.z);
with the ...
2
votes
4answers
1k views
How to detect if object is moving in clockwise- or counterclockwise direction?
I've read this one, but I need more info: rotating an object from sourceAngle to destAngle, both 0-359, clockwise or counter clockwise?
I have a ball. The user is able to drag the ball in any ...
1
vote
1answer
138 views
Using circles to create a sphere
I've been working on creating spheres in a 3D space recently, and have successfully created cylinders. I've just run into a little problem. For some reason, my "Spheres" end up looking like very thick ...
1
vote
1answer
286 views
Raycasting “fisheye effect” question
Continuing my exploration of raycasting, I am very confused about how the correction of the fisheye effect works.
Looking at the screenshot below from the tutorial at permadi.com, the way I ...
0
votes
1answer
94 views
getting direction of x and y… north,south,east,west
I have a player in the center of the screen, where I also have my mouse position origin. (0,0) I would like to know the direction of the mouse, imagine splitting the screen with a X, so the top ...
0
votes
3answers
355 views
Game Institute Math Courses
I'm 21 years old and I suck at math, I mean really bad. I don't have the necessary logic to apply it towards programming. I would like to learn the math and logic of applying it. I found Game ...
0
votes
2answers
140 views
Asteroids Movement
I have been making an asteroids clone, in C#. However, the ship's movement is... not quite right.
My plan is this: there is a speed, and two directions, namely the direction the ship is facing ...
0
votes
1answer
103 views
Points around a circumference C#
Im trying to get a list of vectors that go around a circle, but i keep getting the circle to go around several times. I want one circel and the dots to be placed along its circumference. I want the ...
0
votes
1answer
541 views
Calculate the angle between two 3d vectors: Function always returns 89.1-89.9
I have my own 2d game and I am attempting to calculate the angle between 2 GameObjects.
My Problem: My function that is meant to calculate the angle(direction) between 2 Vector3's doesn't appear to ...
0
votes
1answer
134 views
Minimap Around Perimeter of Screen, Code Provided
What I'm essentially trying to do is what a lot of FPS's nowadays do in regards to their HUD. When an objective is off-screen, a small icon / symbol is shown on the perimeter of the screen, basically ...
0
votes
2answers
85 views
Need to use trig to make a ship point in the right direction
I'm making a 2D spaceship-shooter game that moves in all directions, (i.e. ( -x, +x ),( -y, +y ) ).
I'm trying to make the spaceship face the direction of the movement according to a virtual ...
0
votes
0answers
108 views
Incorrectly says that 2 rectangles collide: whats going wrong?
I am using and expanding a function that detects whether two 2d rotated rectangles collide. The function is from here.
My Problem: The function incorrectly detects a collision between the following ...
0
votes
0answers
94 views
What is the connection between an isometric angle and scale
I am trying to work out an isometric projection matrix for a custom angle.
In the engine I'm using there's a projection matrix defined like so:
projection.rotate(45 * (Math.PI / 180) );
scale = ...
