3D refers to three dimensional space where coordinates are represented with X, Y and Z values.

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2
votes
3answers
629 views

In a 2D top-down game, how can I create projectiles that have a height?

A 2D game called Deer Hunter has projectiles like this: Are the projectiles 2D or 3D models? How could I implement something similar?
8
votes
2answers
3k views

In Unity, why is adding a Vector2 and a Vector3 ambiguous but assigning isn't?

Given the following two vectors: Vector3 v3 = Vector3.one; Vector2 v2 = Vector2.one; This line is ambiguous: v3 += v2; // Unity reports dimension ambiguity whilst this assignment isn't: v3 = ...
0
votes
1answer
180 views

Calculate 3D “up” vector to align ship to an arbitrary axis

I'm writing a script to control the movement of a 3D ship in a game. Given the ship's position and the coordinates of the destination, I've successfully calculated the Yaw and Pitch necessary to aim ...
0
votes
1answer
56 views

XNA Rendering Blocks

I am currently building a little game in XNA and found something strange. I want to draw many blocks next to another (1x1x1 with a texture on the side) So what happens when I do it this lines ...
1
vote
1answer
300 views

Simulation of ball movement in a 3d landscape. The easiest way?

I have a landscape(generated via Perlin noise) and a ball. I want the ball to move along the geodesic(implementation of basic physics: gravitation, friction). I thought to do raycast around the ball ...
-2
votes
1answer
177 views

Unity skips menu screen and goes to next scene

I am using Unity 4.6.1 and I am working on a game project. I created a JS script with Application.LoadLevel to go to the next scene. Here is my code for OnGUI: function OnGUI () { { ...
0
votes
1answer
51 views

Given a ray-intersect position on morphed mesh, how to compute that position at each morph target?

I'm working on an annotation system that allows a user to click on a mesh to attach a pin with a label hanging off it. It must be possible to pin an annotation on an object that's being morphed with ...
6
votes
2answers
2k views

How to customize a character with new objects (clothes, body parts) in a 3D game?

how do we customize a character in a game by adding, for example, a different clothing? The character has an armature, made in Blender, if I add a new object with the game engine, I would have to copy ...
2
votes
1answer
349 views

Simple Doom style engine question

I've just started making a 'raycast' engine, a pseudo 3D FPS engine similar to Wolfenstein/Doom. I haven't done much reading so my implementation is likely very naive. My current working prototype ...
0
votes
1answer
603 views

How do 3D games create the illusion of depth?

How do libraries like OpenGL convert three dimensional coordinates into the two dimensional pixels we see on our screens? I'm not talking about the 3DS or games that require 3D glasses, but rather the ...
1
vote
1answer
427 views

My .FBX model is not picking the .TGA texture file

I'm at a complete loss. An artist has sent me a 3D model so I can test it in Unity. This is exactly what I got: - Guy.fbx - Guy_DIF_512.tga Alright. So I move the folder into the Unity ...
1
vote
1answer
188 views

How to make a textured tree model outside of unity that can be used in unity

So I am trying to make a 3d model of a tree that is textured that can be used in unity. So far I have tried two separate ways to do this and they both didn't work. The first time I used blender's tree ...
5
votes
1answer
202 views

What direction is forward when the rotation is (0, 0, 0)?

I'm representing the rotations of my actors (or gameobjects) with euler angles (one float for each axis). And I've always considered the vector (1,0,0) (x,y,z) to be the actor's direction if all ...
4
votes
2answers
269 views

Rotating a 3rd person camera toward a target

I have a 3rd person camera that doesn't look directly at the player but somewhere in front of him. When the user enter shooting mode, I want the camera to turn around the player to face the target. ...
1
vote
1answer
179 views

Position and rotate a 2D point array into a 3D world

I have a set of 2D points (defining a flat 2D 'connect the dots' shape). I want to calculate the 3D positions for these 2D points at a specific 3D position and rotation. For example, say I have five ...
1
vote
1answer
486 views

DirectX 11 vertex shader incorrectly sending <0, 0, 0> normal vector to pixel shader

I'm following the Rastertek tutorials. I'm unable to get diffuse lighting working from http://www.rastertek.com/dx11tut06.html. I think the NaNs in the following screenshots is just from stuff ...
2
votes
2answers
1k views

Create a continuous flight path on a Bezier Curve in Unity3d

I am working on a game in which a butterfly is flying along some path. What I am trying to do currently is create a Bezier curve starting from the butterfly's position(previous curves end point) and ...
3
votes
1answer
214 views

How to render a pseudo-3D view like in the game Biosys (1999)? [closed]

Biosys is a PC game released in 1999, where navigation through its environments is done by clicking an "exit" on a scene, taking the player to a new scene. The player can't move in a scene, and ...
1
vote
1answer
290 views

Creating a 3D mushroom cloud [closed]

Hi I am trying to create a mushroom cloud animation for my strategy game. Something like this. I have been looking at info for creating explosions in general, and the way to go seems to be using 2D ...
0
votes
2answers
1k views

How to stop 3D model from reflecting light like plastic

I was browsing SketchFab and found a 3D model I decided to try in Unity. This is how the model looks in SketchFab's viewer: When I put it in Unity, I used a Directional Light object: As you can ...
0
votes
0answers
246 views

Insert 3d text to the front face of a cube GameObject

I want to add a text to a cube in Unity. I have a cube which has a 3d text as a child. I am using the below javascript to write on the 3d text: #pragma strict function Start () { } var countdown : ...
1
vote
0answers
193 views

How do I implement realistic recovery from weapon recoil?

I want to create an equation determining how fast a gun recovers back to its center after it has fired. I have a weapon system functioning based on constants (recoil amount, bullet spread, etc.) ...
1
vote
1answer
474 views

Creating a 2d look sprite sheet and textures out of 3d models [duplicate]

I'm trying to make a 2d game (rpg top down), and I've got no 2d artists help me out making 2d characters and textures, but I have one who can make 3d stuff (using Blender and 3d Max), I was wondering ...
0
votes
0answers
37 views

Rotating between two coordinate frames

I have two coordinate frames, A and B. I want to create the rotation matrix RAB which takes you from A to B. A is a right-handed system, and B is a left-handed system. Furthermore, after moving from a ...
4
votes
2answers
466 views

How can I achieve a pseudo-3D camera effect like this?

I am trying to achieve a pseudo-3D camera effect similar to this: I have gotten the following results using a 3D camera and billboards: I am now running into the following problems: In the ...
1
vote
0answers
126 views

Find the largest empty space inside a cube populated with a point cloud?

Lets say we have a set of points (x, y, z) where we know 0 < x < 1 (same for y and z). Now that 3d space is populated with monsters, players or what not. The points represent their location. We ...
2
votes
2answers
656 views

Does PBR mean only one, right technique to view 3D scenes?

For example if I call Unity 5 render pipeline a PBR (Physically-Based Rendering) and Unreal Engine 4 render pipeline as well PBR, does it mean that the same model with the same PB textures will be ...
1
vote
0answers
69 views

Zoom to Mouse on a Globe using a Perspective Projection

I am trying to create a strategy game that takes place on a globe (i.e. a textured sphere). I would like to be able to zoom to mouse like on google maps. My camera always points towards the center of ...
2
votes
2answers
1k views

How to synchronize damage with attack animation in a RTS game?

I have been working on a RTS game in unity and did damage deal through code and a timer but it does not fit with the animations quet well. The damage is dealt in the beginning of the animation and ...
1
vote
0answers
74 views

XNA/DirectX: Advanced 3D Sound

Im currently working on an xna game with c#. Ive been looking into 3D Sounds recently as this is the next objective on my list. Ive found several tutorials online and they dont work to the standards ...
0
votes
1answer
230 views

3D OBB vs OBB Collision Detection and Response

I need to know how to do collision detection and response for 2 3D OBB objects. I will also need to be able to have certain objects disabled (no collision, incase I need to test something like a ...
0
votes
1answer
175 views

Center a 3D model to cursor's position

I am having a hard time understanding how to go about this. I have a 2D game with some 3D models in it. I want to move a 3D model to where the mouse cursor is currently at in every frame (In other ...
0
votes
1answer
123 views

Multiple Vertex Layouts

I have different vertex layouts I'm using to render things in DirectX and as of now I've just used the same vertex layout for every mesh I load in. But now I want to have the vertex layout change ...
1
vote
1answer
65 views

Finding the side of a shape a ray intersects

For some simple 3D shapes (cubes, prisms) how can I determine which side a ray intersects, knowing the direction of the ray, and the normals of the shapes' sides. I thought of using plane ...
0
votes
1answer
86 views

Draw 3D model on top of another one

I am trying to draw a 3D model I made with Blender in Monogame/XNA and this is the result I get when I draw 2 of them on top of each other How can I make it so that the colors don't add up, but the ...
0
votes
0answers
25 views

How does collision detection work? [duplicate]

I was curious on how hit collision works in games. I know there is a simple method that gives every object in a 2D or 3D world a recengular hitbox that makes it easy to detect a collision, but when ...
1
vote
1answer
2k views

A* pathfinding in 3D

I've looked through some A* pathfinding algorithm examples, but as far as i know they work with grids e.q -> http://qiao.github.io/PathFinding.js/visual/ But how can I use this algorithm in my 3D ...
0
votes
1answer
140 views

Calculate future 3D Position of object(Unit)?

I've looked around and almost all examples is see have a velocity vector which I do not have, or at this point am unable to figure out. Im trying to find the 3D position where i can launch a trap in ...
0
votes
0answers
57 views

Stuck on a steering problem

i'm building a car game, and currently working on the steering. i would like to change the motion of Z rotation so that the car rotates around the Z axis when the wheels are turned. I can't set the ...
2
votes
2answers
215 views

How to calculate a 3D orientation from 2D vanishing lines on an image?

Let say I have a image that represent a 3D scene. I did not have the 3D camera orientation of that scene (left, up and forward vectors) and i'd like to calculate it. On that picture, I draw the ...
6
votes
4answers
2k views

What is the simplest way to calculate distance in a 3D environment?

What is the simplest way to programmatically calculate difference between two points in a 3D game environment? I am trying to sort a list of light sources by how close they are to an entity, so that ...
0
votes
1answer
86 views

Implement a Vision cone in 3D

I'm looking at how to implement a vision cone for my AI. Everything I look at talks about a forward vector, but in my situation, and I'm not that great with math, I have a vector but it doesn't give ...
1
vote
1answer
124 views

“aim at” in 3D space algorithm

I'd to calculate the cartesian rotate values of "aiming" one point at another in 3D space. For example, assuming rotation order of XYZ: Point A is at [0, 0, 0] Point B is at [2, 2, 0] If point A was ...
0
votes
3answers
695 views

How to render grid properly, especially over distance?

I'm drawing a grid, pretty much like one can see in the Unity editor itself or any 3D-editor, many 3D-related applications and some games. But it doesn't look pretty in my case. I put a few random ...
3
votes
1answer
172 views

Easiest way to make a 3D overworld [closed]

Using something like Blender, would it be easier and more time and space efficient to create 'tiles', and use some kind of software like Tiled to use these tiles in the various maps, or would it be ...
0
votes
4answers
97 views

YAW not working correctly with XNA

I successfully draw the model, and made it move forward and backward, but when I try to make it rotates (yaw) its not working correctly, like its moving too instead of only rotate. Here is my camera ...
0
votes
1answer
53 views

How to rotate model 180º with XNA

I got a model, and a camera pointing at this model, I think my camera position is the problem. Its showing the front of the model, but I want it to show its back like in third person. My camera code ...
0
votes
1answer
149 views

Perspective Projection - Drawing Lines

So I sort of understand the math behind projecting 3d points onto a 2d plane. It's just some simple dividing and multiplication of distances. However I can't seem to wrap my head around projecting ...
0
votes
1answer
111 views

Intersperse 2D with 3D opengl

I want to be able to draw 3D objects as well as 2D objects in an openGL environment. Normally, I would draw my 3D stuff, disable the depth buffer and depth mask, then draw my 2D stuff. However, this ...
3
votes
2answers
804 views

3D models on 2D background perspective mismatch

we are working on a tactics game, with a hand drawn 2D backgrounds and 3D models moving on them. The game generates a 2D grid placed on a XY plane, with faux isometric tiles (Diamond Grid). I have ...