gl_Position is a special variable used to store the final position. V_Normal = vec3(u_ModelViewMatrix * vec4(a_Normal, 0.0)) Transform the normal's orientation into eye space. V_Position = vec3(u_ModelViewMatrix * a_Position) Mat4 u_ModelViewMatrix = u_ViewMatrix * u_ModelMatrix Varying vec2 v_TexCoordinate // This will be passed into the fragment shader. Varying vec3 v_Normal // This will be passed into the fragment shader. Varying vec3 v_Position // This will be passed into the fragment shader. Uniform mat4 u_ProjectionMatrix // A constant representing the projection matrix.Īttribute vec4 a_Position // Per-vertex position information we will pass in.Īttribute vec3 a_Normal // Per-vertex normal information we will pass in.Īttribute vec2 a_TexCoordinate // Per-vertex texture coordinate information we will pass in. Uniform mat4 u_ViewMatrix // A constant representing the view matrix. Uniform mat4 u_ModelMatrix // A constant representing the model matrix. I'm using these shaders right now: // vertex shader I'm pretty sure the model is fine, since Blender can render it correctly. I thought it could be a face winding problem, so I tried to disable GL_CULL_FACE, but it didn't work. GlClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT) Right now I do that on initialisation: glEnable(GL_CULL_FACE) // Cull back facing polygonsĪnd I'm also doing that for every frame: glClearColor(0.7f, 0.7f, 0.7f, 1.0f) I tried to change values for z-near and z-far without any effect.

In this second image I rendered (a linearized version of) the z-buffer into screen to see if it could be a z-buffer problem. I'm currently having a strange problem in which some parts of the model are not visible, even when they should be. I'm using Assimp to render 3D models with OpenGL ES 2.0.

OpenGL ES 2.0 model