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POAndroid and OpenGL "how display faces"
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  1. POAndroid and OpenGL "how display faces"
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    copied!<p>I want to display for example an *.obj file. and normal, in OpenGL I use instruction :</p> <pre><code>glBegin(Traing..); glVertex3f(Face[i].VertexIndex); glTexcoords2f(Face[i].TexcoordIndex); glNormal(Face[i].NormalIndex); glEnd(); </code></pre> <p>But in Android OpenGL i don't have this functions... i have an DrawElements(...); but when I want draw face 34/54/3 ( vertex/texcord/normal index of arrays) it's drawing linear 34/34/34...</p> <p>so how I can draw a *.obj file?</p> <hr> <p>I search in the web and I found this topic : <a href="http://www.anddev.org/android-2d-3d-graphics-opengl-problems-f55/obj-import-to-opengl-trouble-t48883.html" rel="nofollow">http://www.anddev.org/android-2d-3d-graphics-opengl-problems-f55/obj-import-to-opengl-trouble-t48883.html</a> So.. I writing an Model editor in C# to my game and I wrote something like that for test :</p> <pre><code> public void display2() { GL.EnableClientState(ArrayCap.VertexArray); GL.EnableClientState(ArrayCap.TextureCoordArray); GL.EnableClientState(ArrayCap.NormalArray); double[] vertexBuff = new double[faces.Count * 3 * 3]; double[] normalBuff = new double[faces.Count * 3 * 3]; double[] texcorBuff = new double[faces.Count * 3 * 2]; foreach (face f in faces) { for (int i = 0; i &lt; f.vector.Length; i++) { vertexBuff[i_3] = mesh[f.vector[i]].X; vertexBuff[i_3 + 1] = mesh[f.vector[i]].Y; vertexBuff[i_3 + 2] = mesh[f.vector[i]].Z; normalBuff[i_3] = normal[f.normal[i]].X; normalBuff[i_3 + 1] = normal[f.normal[i]].Y; normalBuff[i_3 + 2] = normal[f.normal[i]].Z; texcorBuff[i_2] = texture[f.texCord[i]].X; texcorBuff[i_2 + 1] = texture[f.texCord[i]].Y; i_3 += 3; i_2 += 2; } } GL.VertexPointer&lt;double&gt;(3, VertexPointerType.Double, 0, vertexBuff); GL.TexCoordPointer&lt;double&gt;(2, TexCoordPointerType.Double, 0, texcorBuff); GL.NormalPointer&lt;double&gt;(NormalPointerType.Double, 0, normalBuff); GL.DrawArrays(BeginMode.Triangles, 0, faces.Count * 3); GL.DisableClientState(ArrayCap.VertexArray); GL.DisableClientState(ArrayCap.TextureCoordArray); GL.DisableClientState(ArrayCap.NormalArray); } </code></pre> <p>and it's working.. but I think that this could be more optimized?... I don't want to change my data of model to the arraysbuffer, because it takes too much space in memory.. any suggestion? </p>
 

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