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Questions tagged [planet]

The tag has no usage guidance.

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1answer
49 views

Planet Surface Rendering: Precision issues

I have been experimenting with C++ and OpenGL, and I am currently writing a program that renders the surface of a planet; specifically, our moon. It's a modified version of the GPU Gems implementation ...
2
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1answer
66 views

Workflow for creating spherical heightmaps

I'm wondering how I can create a spherical heightmap. In my ideal workflow, you'd see a 3D sphere that you can edit using procedural terrain techniques (like World Creator) and that spherical terrain ...
2
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1answer
51 views

move toward object and transition to circling around it.

While it's easy for me to get a object circle around another and move toward it, i've got a few problems I couldn't find a solution to, yet. Ill go here as follows: I) description of scenario II) ...
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1answer
244 views

Generation of a moon terrain

I am making a small game like Kerbal Space Program. What I do is when I am over a certain height, I render the planet or moon as a sphere. Each planet or moon will have a generation seed to generate ...
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0answers
68 views

Level of Detail and loading map tiles

I'm making some visualization of the Earth. It just should display tiles from services like Google Map (OpenMap for example) on the Earth surface. This services provide Earth satellite image textures ...
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0answers
51 views

How would you go about applying curvature to the rendering of a flat surface?

I want to draw a 2D planet surface. I have a set of tiles, which by themselves are flat if you draw them. Now I want to apply something to the drawing process, which makes it look curved the more you ...
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0answers
218 views

Precision problems with realistically scaled planets/terrains

Recently I've been working on a realistically scaled planet engine. I found several interesting links about how to do it, what problems will come up after, and how to solve them. The approach I took ...
1
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1answer
147 views

seamless stereographic projection

i have been struggling with this problem on and off for a few years now - making a seamless stereographic projection texture mapping on a sphere where the two halves of the sphere use the projection ...
4
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3answers
309 views

How to fill in crevices on a height map

I am a very experienced iOS Developer, but I am beginning my very first foray into 3D graphics (specifically with SceneKit). I'm trying to model a planet, and I have it working with a height map ...
2
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1answer
9k views

Unity3D Get object size in order to be used in Vector3 coordinates

I have a plane in Unity in 3D project, and I want to get its boundaries so I can use them in random function for getting Vector3 ...
5
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3answers
480 views

Map building grid to planet

I'm trying to build a space game and one of the key parts is building on spherical planet. I want the buildings to be build on a grid (some building are 1x1, some 6x4,..., kinda like StarCraft). My ...
3
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0answers
159 views

OpenGL Planet Generation - Simple Matrix Issue (Planet “Spins” With Mouse)

I originally asked this question on StackOverflow & was directed here by a commenter. Im currently working on a OpenGL planet rendering. I'm using the Tessellation pipeline. So far things are ...
1
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1answer
698 views

How do I fix my planet-facing camera?

Summary I'm having trouble implementing a camera controller suitable for first person use around a planet. The camera needs to be oriented correctly according to gravity (vector from camera ...
3
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3answers
758 views

How can I render something like the swirling clouds of Jupiter?

The effect should be as similar as possible to this, though it does not need to be at planetary scale. I was thinking that it could be done offline via particles, perhaps by directing their motion ...
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2answers
441 views

How can I compute the orbit of one body around another?

I'm attempting to have a planet (with a known mass and radius) orbit it's sun (also with a known mass and radius). It doesn't have to be 100% realistic, but it should be possible that the sun have ...
1
vote
1answer
116 views

Camera Aligned To Sphere Surface

I am writing a planet renderer and have come across a problem that is really limiting the usability of the program. When I am on the planet (anywhere but the north pole) I cannot rotate the camera to ...
4
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1answer
1k views

Creating Seamless Perlin Noise Across Faces of Cube

I am writing a planet renderer and have stumbled into a problem that I cannot solve. I am generating heightmaps in a glsl pixel shader. These heightmaps are generated for every quad in the quadtree ...
4
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3answers
3k views

Constructing a Planetoid Cube World?

This is sort of a multidisciplinary question, so I'm asking it here rather than on one of the other Stack Exchange sites. I've been toying with the idea of making a game that's a mix between ...
1
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0answers
32 views

XNA - Wrap heightmap around sphere [duplicate]

I have an idea for a small game which would generate random 3D planets. I already have found a way to create a random heightmap in XNA (http://adminspot.net/topic/487-cxnamath-fast-procedural-...
5
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2answers
4k views

Rendering artifacts at a large scale

I'm a new to OpenGL or graphics in general. Trying to write a game with realistic scale. I had a perfectly fine rendering of earth at a small scale, but when I try to scale it up to 1:1 I get this ...
23
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1answer
11k views

Which is the best LOD method for planet rendering?

I'm currently working on my thesis, it is an engine to render terrains of planetary size. I'm still finishing my research and I have encountered a lot of stuff about this subject, the problem is that ...
0
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1answer
2k views

Computing uv coordinates on a sphere approximated from an octahedron

Right now I'm texturing the octahedron with the formular from wikipedia(Finding UV on a sphere): UV Coordinates Wikipedia That unfortunately leads to heavy distortion right at the beginning, which of ...
16
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1answer
7k views

Pathfinding on a uneven planetary surface

My question is what would be the best approach to pathfinding on an uneven planetary surface? Background Information I have created a planet from displacement mapping 6 sphere projected planes. The ...
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2answers
3k views

Atmospheric scattering sky from space artifacts

I am in the process of implementing atmospheric scattering of a planets from space. I have been using Sean O'Neil's shaders from http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter16.html as a ...
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2answers
1k views

Movement on a curved planet surface

I'm looking for a solution for moving a variety of objects over the uneven surface of my planet. The idea is that I will have a number of objects that follow the planetary landscape moving about in ...
1
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0answers
995 views

Unity3d Gravity script issues

I'm try this script out http://wiki.unity3d.com/index.php/Gravity and I'm having some issues with it (it seemed to work when I tried it with an old version of unity) the first issue is of collision,...
3
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1answer
2k views

Realistic planetary terrain generation with weights

I need terrain generation for a planet. The planet will be divided up into several hundred hexes, and I need it to be realistic and based on weights. I have dabbled in terrain generation before, but ...
5
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1answer
1k views

How would I create Dynamic LOD with Quad Trees

I would like to be able to create something like the following http://www.youtube.com/watch?v=LxZhWrSmrOY&feature=player_embedded how would I create something like it? I understand I will have to ...
10
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6answers
5k views

3D Illusion of a 2D Planet Texture

Several years ago I overheard a technique that gives the user the illusion of a rotating planet by using a 2D texture. Given that the user isn't able to change its position or viewport. What's the ...