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

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Material usage, one per model or per object?

Is it better (memory, time (of developer), space) to use single model that is unwrapped and uses a single material or to break a model down into appropriate bits, each with their own smaller ...
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413 views

What name (if any) applies to this particular 3D rendering technique?

Is there a name for this technique where when instead of rendering certain polygons, you just calculate a few key points and do the drawings in 2d? For instance, instead of rendering a sphere, you ...
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212 views

Which 3D Authoring Application to Decide for

I have read a lot individual information about three key 3D Graphics Authoring Applications: Softimage, 3DS Max, Maya. To me, it looks like each of them has its own way to accomplish the same goal, ...
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1answer
385 views

What options do I have for a 3D game without graphics but yet maintaining physics for later?

I don't believe I expressed well the title for my question so if you believe you can change it for a more suitable title please do so or drop me a comment. Currently I am starting a 3D game with C# ...
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1answer
80 views

DX11 Mixing 2D and 3D

So I am somewhat new to working with DirectX rendering, and I have done some 2d and 3d work. I am planning on working on a new application where I will be rendering a bunch of 3d scenery, and then ...
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1k views

Rotation matrix for a 3D vector

I have a direction vector on which I have to apply some rotation to align it to positive z-axis. To use Matrix.CreateRotationX(angle) of XNA, I need the angle for which I'd have to compute cos or tan ...
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2answers
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What dimensions should you use for a perspective projection frustum?

What dimensions should you use for a perspective projection frustum? Initially I created a perspective matrix based on the width and height of the screen, with a calculated zNear value based on a ...
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2answers
1k views

How do I create a “flying through space” effect?

On the Final Destination stage in Super Smash Bros Brawl (and SSB Melee) the players fight on a platform seemingly moving through space: I see particle effects, but I don't understand how they made ...
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1answer
126 views

How to linearly “blend” between multiple 3D points?

I have a set of 3D points that I need to "blend" between. Lets say I have points [A,B,C] and I have the amount I want to blend each as [0.5, 0.2, 0.8], how can I blend between these points with the ...
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3answers
3k views

collision resolve sphere-aabb and aabb-aabb [closed]

I am currently working on a basic physics engine which does not consider rotations. At the moment I work on collision resolving between aabbs and spheres. Unfortunately I have no idea what a collision ...
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2answers
2k views

Render a polyline with rounded joints

I have a list of points (3D) and want to draw a line connecting all points with a specified width. The line should be rendered in OpenGL (using OSG) as triangles. The real challenge of this task is to ...
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3answers
857 views

How to: create a 3rd person view, multiple layer 3d world

Imagine a game world like in Dungeon Keeper or Sim City with an (possibly rotatable) 3rd person view, where the game world can be accessed in all dimensions (in discrete steps). For example digging ...
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1answer
288 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 ...
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2answers
640 views

Unity plane that is normal to Z axis

I want to create a plane that will be normal to the Z axis, but I am having difficulty visualizing what rotation it needs to have. I want to have a top-down view upon the plane such that I can use ...
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2answers
134 views

Is the rendering of distorted point clouds more complex?

I have two point clouds of n points: A dense ball-shape point cloud with many points inside A spherical point cloud with points on its surface. Is there (really) any difference between rendering ...
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2answers
149 views

Find point in 3D plane

I have four points in a 3D space, example: (0,0,1) (1,0,1) (1,0,2) (0,0,2) Then I have a 2D position on that square plane: x = 0.5 y = 0.5 I need to find out the 3D space point of that position in ...
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2answers
482 views

Find closest point from an origin, in a mesh

I want to do something similar to a raycast. With a raycast, you can set an origin and a destiny, and check where the ray collides with something but only with a line. What I want to do, is given an ...
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1answer
128 views

What is w componet [duplicate]

What is the W component on graphics programming. I read a blog about opengl that says that w must be equal to either 0 or 1 here. But the book I am currently reading has put w component to more than 1 ...
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1answer
1k views

What is the logic behind a 3D Projection 'Camera Perspective'? [closed]

Suppose I had a 3D Cube on a 2D plane (screen). And I wanted to use the keypad to move and rotate it. Without referring to a 3D Game Engine that could do this for me can you explain me the logic or ...
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95 views

Moving models with a matrix

Currently I have a playerWorld matrix which holds the position of my player, just a simple sphere. When I press a key to move the model, it does some crazy thing and flies off the screen really fast, ...
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2answers
1k views

Displaying possible movement tiles

What's the fastest way to highlight all possible movement tiles for a player on a square grid? Players can only move up, down, left, right. Tiles can cost more than one movement, multiple levels are ...
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1answer
216 views

Speech recognition and AI in language learning platform [closed]

I work for a publishing company that is looking to create an online virtual environment for English Language Learners. We are keen to create something immersive (virtual 3D world) through which the ...
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2answers
6k views

Collision detection - Smooth wall sliding, no bounce effect

I'm working on a basic collision detection system that provides point - OBB collision detection. I have around 200 cubes in my environment and I check (for now) each of them in turn and see if it ...
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1answer
854 views

How to pick a 3D object with known mouse coordinates if the camera is rotated 60 degrees?

I am making a simple game engine for a simple RTS game and would like to be able to pick a cube and move it around with the mouse coordinates. The problem is that my camera is rotated 60 degrees just ...
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1answer
414 views

Highlight edge on 3d cube in directx

I want to make a 3d editor in DX9/XNA for a project I'm working on. I'm just thinking through how I would go about certain tasks and I'm stuck on one particular thing, which is crucial to making the ...
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1answer
380 views

What data structure should I use for a 3D platformer game?

I am developing a platformer game with XNA framework like Metroid but in 3D. Now I have to draw models and I have the question of the title. I read many post and I know that the main data structures ...
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2answers
2k views

3d bounding Box border xna

So, I'm trying to develop a 3d table tennis game, and I'm having problems when it comes to colliding the ball with the table. I have a bounding sphere for the ball and bounding box for the table, but ...
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2answers
4k views

XNA: draw a sprite in 3d, is that possible?

since now I always used sprited to draw in 2D: spriteBatch.Draw(myTexture, rectangle, color); (I suppose the texture is binded internally to 2 triangles and then scaled.) Now, I'm porting my game ...
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3answers
3k views

Walkin on terrain - Opengl

i wanna walk to terrain... first i created the terrain void desenha_terreno(float px, float pz){ for (int z = 0; z < iwidth-1; z++) { glBegin(GL_TRIANGLE_STRIP); for (int x = 0; x < ...
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684 views

Starting off with coordinate systems [closed]

Where is a good place to start with learning how to program custom coordinate systems in a 3d environment? Are there any good books on he topic of gaming coordinate systems? I would like to build a ...
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3answers
2k views

Correct order of rotation and translation

Trying to get this right in openGL: 1) glRotate( cameraRotation ) 2) glTranslate( -cameraPosition ) 3) glRotate( objectRotation ) 4) glTranslate( objectPosition ) 5) Draw Object is that right?
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4answers
2k views

When learning, nothing is better than practice

A little introduction: I'm 25, and going to this private french school, CreaJeux, which begins in october. I will be learning mostly game programming, something I wanted to do a long time ago, since ...
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1answer
59 views

Unity sidescroller with 3D objects/environment. Should I create a 2D or 3D project?

I'm looking to make a side-scroller in which the camera and all objects can only move in the x and y directions. However, I'm going to have all objects and environments as actual 3D models. Is it ...
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1answer
137 views

How to not render what is behind object?

I am working on a 3d project using openGL. I am looking for a way to optimize my renderings. Is there a way to tell if an object is behind another object and thus not visible to not waste time ...
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2answers
194 views

Unity 3D - Confine a gun rotation within certain degrees

I am having troubles making my gun rotate up and down, and have limits, for example, I want the down limit to be 0 degrees, and the up limit to be 90 degrees. Currently I can't figure out how to ...
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2answers
57 views

Translating Objects in Worldspace

Given the worldspace coordinates of a collection of arbitrarily positioned objects, how do I translate them while preserving their relative placement? For instance, I have a table and a few bowls that ...
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237 views

Solving the “bullet problem” [duplicate]

I have a 3D matrix filled with "empty space" where I put some objects (objects are represented as bunch of occupied space). The bullet is fired from coordinates (x1,y1,z1) at angles ...
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1answer
127 views

Rotate an arrow on a plane?

I'm creating a display for a GPS-based embedded system and would like to have an arrow indicating the current bearing. I'd love the arrow to have a 3d appearance by rotating it on a plane tilted up ...
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1answer
690 views

Tile textures on 3D models. HLSL shader code maybe?

I'm making a game in C# with XNA. I'm now applying textures to models. However if I change the scale of the model, the texture stretches with it. How can I make the texture tile over the model instead ...
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1answer
158 views

Can I render some vertices as an object instead?

I am generating vertices at runtime that represent terrain. I've always drawn the vertices as triangles with GraphicsDevice.DrawUserPrimitives<VertexPositionColor>, but I'm wondering: Can ...
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2answers
192 views

Can you adjust the proportions of a 3D model via scripting?

We are developing a game in Unity where the character is different ages in different levels. Would it be possible to use a single 3D model asset, and alter its proportions via scripting to achieve ...
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2answers
153 views

How to use blender files in your own engine?

It is not trivial to use your own shader on blender, so I've created a good-looking webgl shader. Now, what do I need to use the things I made in blender on it? An obvious first idea would be to parse ...
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3answers
796 views

How do I correctly multiply an XMMATRIX by a scalar?

Using DirectXMath and its XMMATRIX structure in C++ and Direct X 11, how does one multiply that matrix structure by a single float scalar? I want to implement the operation B = A * f; where A and B ...
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1answer
250 views

What is the purpose of inertial space and what are its uses?

I'm currently reading about left-handed and right-handed coordinate systems when working with 3D and it's all very fascinating. These systems are made up of world space, object space, and inertial ...
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1answer
123 views

Models not rendering when far away

I am making a game where objects are represented by colored cubes. I have files that mark the location and rotation of the cubes. I've been using Processing's 3D library and the cubes disappear within ...
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1answer
111 views

Variable sized cube texture stretching problem

I have a 1x1x1 cube made in Blender with a simple UVW mapping. It represents a 3D platform of variable size. The thing is that this cube gets resized a lot, and I want to draw a "border" of a ...
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2answers
179 views

How do I derive the angular movement for a craft

I have the regular (linear) motion implemented like this: class Craft{ ... Vector location, velocity, acceleration, angularVelocity, angularAcceleration; ... //the move class responsible for linear ...
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1answer
293 views

Quick 3D sight calculation algorithm

I have a tile based board game where units move in 3D space on a 2D isometric view. When calculating attack tiles for a unit, how do I verify that they aren't shooting through a wall or a level too ...
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1answer
149 views

UV Mapping Problems

I'm creating an alien in blender, doing my best to base it on the guys from toy story. When I create the UV Map and colour it, import it back in then take a look at it in a seperate window there is ...
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473 views

XNA seams between 3d primitives in tiled terrain

Every time I draw two primitives side by side, in this case two quads, I always get this seam-like tearing effect right along the sides of them. I'd like to think there is just an easy fix, but the ...