textures

I've seen well-textured balls, planets, and other spherical objects in couple of games, last time in UFO: aftermath. If you just splatter a texture into latitude/longditude as u and w -coordinates you'll get lots of ugly texture distortion to poles. I can think myself an one way to implement a spherical map with minimum distortion. By mapping in triangles instead of squares. But I don't know any algorithms. How to produce vertices and texture coordinates for such spheres? Also, I don't see a way to generate a complete spherical map from a simple flat square map. Is there some intuitive way on

In my live wallpaper I'm drawing 3 textured quads that covers the whole screen. On Nexus One I get 40fps. I'm looking for ways to improving performance. The quads are blended on top of each other, textures are loaded from RGB_8888 bitmaps. Textures are 1024x1024. I've got glDisable(GL_DITHER); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); glDisable(GL10.GL_LIGHTING); glDisable(GL_DEPTH_TEST); glEnable(GL_TEXTURE_2D); glEnable(GL_BLEND); glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); Things I've tried, all resulting in the same 40fps: Reduce texture size to 512x512 and 256x256 Use draw

How would I link in or compile SOIL ( http://lonesock.net/soil.html ) into my C++ OpenGL project on Mac OS X? On newer versions of Mac OS X, such as Leopard, you'll have to edit the make file and add '-arch 1386 -arch x86_64' to the CXX macro of the Makefile. After compiling, you'll also have to link in the CoreFoundation.framework in your project. So your final build command might look something like gcc -Wall -lSOIL -framework OpenGL -framework GLUT -framework CoreFoundation There's a makefile in the zip that you could try using (projects/makefile). You'll want to rename makefile to __M_

I have an app that I've been repeatedly playing with in android, it uses opengl-es. Currently I load textures from a bitmap like so: //Load up and flip the texture - then dispose the temp Bitmap temp = BitmapFactory.decodeResource(Deflecticon.getContext().getResources(), resourceID); Bitmap bmp = Bitmap.createBitmap(temp, 0, 0, temp.getWidth(), temp.getHeight(), flip, true); temp.recycle(); //Bind the texture in memory gl.glBindTexture(GL10.GL_TEXTURE_2D, id); //Set the parameters of the texture. gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR); gl

In my 2D isometric engine, I have the following classes : `maps(variable)/layers(variable)/cubes(variable)/sides(6)/points(4)/coordinates(3)` Each sides contains 4 points (1 point = 1 coordinate (x, y, z)). Each cubes contains 6 sides. I can create a map with the size i want with cubes(same, the size i want). Folers: assets/numTexture/numLight.png I calcule with numTexture and numLight a number wich is the textureNumberEntry(i loaded all numLight.png(textures) in an array). But texturing gones wrong: I define my cubes coordinates in the layer class : for(int J = 0; J < mapSize; J++) { for(int

I'm working on creating a shader to generate terrain with shadows. My starting point is to clone the lambert shader and use a ShaderMaterial to eventually customise it with my own script. The standard method works well: var material = new MeshLambertMaterial({map:THREE.ImageUtils.loadTexture('images/texture.jpg')}); var mesh = new THREE.Mesh(geometry, material); etc The result: However I'd like to use the lambert material as a base and work on top of it, so I tried this: var lambertShader = THREE.ShaderLib['lambert']; var uniforms = THREE.UniformsUtils.clone(lambertShader.uniforms); var

How can I repeat a selection of a texture atlas? For example, my sprite (selection) is within the texture coordinates: GLfloat textureCoords[]= { .1f, .1f, .3f, .1f, .1f, .3f, .3f, .3f }; Then I want to repeat that sprite N times to a triangle strip (or quad) defined by: GLfloat vertices[]= { -100.f, -100.f, 100.f, -100.f, -100.f, 100.f, 100.f, 100.f }; I know it has something to do with GL_REPEAT and textureCoords going passed the range [0,1] . This however, doesn't work: (trying to repeat N = 10) GLfloat textureCoords[]= { 10.1f, 10.1f, 10.3f, 10.1f, 10.1f, 10.3f, 10.3f, 10.3f }; We're