#OPENGL 2.0 TUTORIAL ANDROID HOW TO#

#OPENGL 2.0 TUTORIAL ANDROID HOW TO#

We will also need to tell OpenGL how to map this image onto the mesh this is done in two steps, fist we need to assign UV coordinates If you rather want a blurred image you should use the GL10.GL_LINEAR parameter. If you want a crisp and clean rendering like this image you need to use the GL10.GL_NEAREST parameter.

IвЂ™m only going to show you two of them the rest you can investigate your self ) You need to pass an argument to these functions. scale linearly when image smalled than texture

If the texture is smaller it needs to be magnified that is done with the magnification function: // Scale up if the texture if smaller.ДЄnd how to scale if the texture needs to be scaled down using the minification function. There is a couple of parameters we need to set on the texture, the first one is to tell OpenGL what to do if the texture need to be shrunk or magnified to match the rendered image. With textures we use the command glBindTexture: gl.glBindTexture(GL10.GL_TEXTURE_2D, textures) ДЇrom this point all commands we call on regarding textures will be applied on to your texture with the generated id. Now when the texture idвЂ™s are generated we need to just like everything else tell OpenGL what to work with. With the same parameters you can delete the textures: // Delete a texture. Create an int array with the number of textures we want, In this example we will only have one texture. Generating a textureДЄfter we have loaded the bitmap we need to tell OpenGL to actually create the texture.ДЇirst thing we need to do is to let OpenGL generate some texture idвЂ™s that we will use as handles to the textures later on. If you run a texture with a size of 30x30pixels on a hardware that donвЂ™t support it you will just get a white square (unless you change the default color). One other thing about textures is that some hardware requires that the height and width are in the power of 2 (1, 2, 4, 8, 16, 32, 64вЂ¦). Bitmap bitmap = codeResource(contect.getResources(), IвЂ™m going with the simplest one for this example witch is loading from the resources. You can get hold of a bitmap in many different ways from downloading, generating or simply just load one from the resources. Loading bitmapsДЇirst step would be to get a bitmap to generate a texture from. There is a couple of different steps involved with adding a texture to the mesh I will try to go through them all and explain the basics about them. The most common way of adding colors to your mesh is to add a texture. Last tutorial we worked a bit more on meshes and we have also talked about adding colors to our mesh. I have started a new updated serie of tutorials on OpenGL ES 2.0 for android.

Opengl 2.0 tutorial android