Lighting with VBO

Posted by nkint on Game Development See other posts from Game Development or by nkint
Published on 2012-05-31T16:05:33Z Indexed on 2012/05/31 16:51 UTC
Read the original article Hit count: 291

Filed under:

jogl

|

vertex-arrays

|

light

I'm using a Java JOGL wrapper called processing.org. I have coded some enviroment on it and I'm quite proud of it even if it has some ready stuffs that I didn't know anything about it (==LIGHTS).

Then, for some geometry, I've decided to use a VBO. I had to pass in the hard way and recode all lights. But I can't achieve the same result.

This is the original light system: enter image description here

And this with VBO:

enter image description here

With this code:

Vec3D l;

gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_LIGHT0);
gl.glEnable(GL.GL_COLOR_MATERIAL);
gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL.GL_AMBIENT, new float[]{0.8f,0f,0f}, 0);

l = new Vec3D(0,0,-10);
gl.glColor3f(0.8f,0f,0f);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, new float[] { l.x, l.y, l.z, 0 }, 0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPOT_DIRECTION, new float[] { 1, 1, 1, 1 }, 0);

I can't achive the same light, the same color material, and the same wireframe stuffs.

If needed I can also post the code I use for VBO, but it is quite standard vertex array grabbed on the net that uses glDrawArrays

© Game Development or respective owner

Related posts about jogl

Screen Capture Under Win7 of JOGL Applet

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I'm trying to take a screen shot of an applet running inside a browser. The applet is using JOGL (OpenGL for Java) to display 3D models. (1) The screen shots always come out either black or white.The current solution uses the usual GDI calls. Screen shots of applets not running OpenGL are fine… >>> More
JOGL Double Buffering

as seen on Stack Overflow - Search for 'Stack Overflow'
What is eligible way to implement double buffering in JOGL (Java OpenGL)? I am trying to do that by the following code: ... /** Creating canvas. */ GLCapabilities capabilities = new GLCapabilities(); capabilities.setDoubleBuffered(true); GLCanvas canvas = new GLCanvas(capabilities); ... /**… >>> More
Problem with JOGL and Framebuffer Render-to-texture: Invalid Framebuffer Operation Error

as seen on Stack Overflow - Search for 'Stack Overflow'
Okay, so I am trying to render a scene to a small 32x32 texture and ran into problems. I get an "invalid framebuffer operation" error when I try to actually draw anything to the texture. I have simplified the code below so that it simply tries to render a quad to a texture and then bind that quad… >>> More
Java 3D-API that uses JOGL

as seen on Stack Overflow - Search for 'Stack Overflow'
Can someone recommend me a package similar to JCollada for 3d rendering that is based on JOGL or point me to a place where I can obtain JCollada? The original site for JCollada has a SVN link that is no longer working (empty svn repositry). >>> More
Texture loading at joGL

as seen on Stack Overflow - Search for 'Stack Overflow'
hi I've been trying to load a bmp picture to use it as a texture at my program I've used a IOstream Class to extend DataInputStream to read the pixels at the photo with this code "based on a texture loader code for c++ " : //class Data members public static int BMPtextures[]; public static int… >>> More

Related posts about vertex-arrays

Beginner question about vertex arrays in OpenGL

as seen on Game Development - Search for 'Game Development'
Is there a special order in which vertices are entered into a vertex array? Currently I'm drawing single textures like this: glBindTexture(GL_TEXTURE_2D, texName); glVertexPointer(2, GL_FLOAT, 0, vertices); glTexCoordPointer(2, GL_FLOAT, 0, coordinates); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); where… >>> More
Optimum ordering for packed vertex arrays on iPhone

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there an optimum packing format for vertex arrays on the iPhone hardware? My textured (triangle) arrays are ordered: Vertex (x, y, z) Vertex Normal (x, y, z) Texture Coordinates (u, v) This is the way I've always done it. Should the UVs come before the normals? I'm not sure if it matters. I'd… >>> More
textures and vertex arrays with OpenGL?

as seen on Stack Overflow - Search for 'Stack Overflow'
Basically what I'd like to do is make textured NGONS. I also want to use a tesselator (GLU) to make concave and multicontour objects. I was wondering how the texture comes into play though. I think that the tesselator will return verticies so I will add these to my array, that's fine. But my vertex… >>> More
SFML: Generate a background image

as seen on Game Development - Search for 'Game Development'
I want to generate a background, which is used in the game, on every instance of the game based on certain conditions. To do so, I'm using a sf::RenderTexture and a sf::Texture like this: sf::RenderTexture image; std::vector<sf::Texture> textures; sf::Texture texture; // instantiating the vector… >>> More
Refactoring an immediate drawing function into VBO, access violation error

as seen on Game Development - Search for 'Game Development'
I have a MD2 model loader, I am trying to substitute its immediate drawing function with a Vertex Buffer Object one.... I am getting a really annoying access violation reading error and I can't figure out why, but mostly I'd like an opinion as to whether this looks correct (never used VBOs before)… >>> More