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POC++ - Buffer combining adding extra empty values
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copied!<p>I am trying to fill two buffers, an index buffer object and a vertex buffer object in C++.</p> <pre><code>// Create the IBO and VBO data GLushort* iboData = new GLushort[polyProcessed * 3]; Vertex* vboData = new Vertex[vertProcessed]; int iboPos = 0; int vboPos = 0; // Create the VBO and IBO for(int i = 0; i < fragMap[0x36]; i++) { // Copy the data to the IBO memcpy(iboData + iboPos, zmeshes[i].indices, zmeshes[i].numPoly * 3 * sizeof(GLushort));//sizeof(*zmeshes[i].indices)); // Advance the position iboPos += zmeshes[i].numPoly * 3 * sizeof(GLshort); // Copy the data to the VBO memcpy(vboData + vboPos, zmeshes[i].vertices, zmeshes[i].numVert * sizeof(Vertex));//sizeof(*zmeshes[i].vertices)); // Advance the position vboPos += zmeshes[i].numVert * sizeof(Vertex); errorLog.writeSuccess("Build log: VBO size %i VBO pos %i IBO size %i IBO pos %i", zmeshes[i].numVert * sizeof(Vertex), vboPos, zmeshes[i].numPoly * 3 * sizeof(GLshort), iboPos); } </code></pre> <p>It's simply getting the size of the data to be copied, copying it, and then advancing the position (where to put the next data in the buffer).</p> <p>I get an output like this:</p> <pre><code><---> Index dump: 0 <---> Index dump: 1 <---> Index dump: 2 <---> Index dump: 2 <---> Index dump: 3 <---> Index dump: 0 <---> Index dump: 4 <---> Index dump: 5 <---> Index dump: 23 <---> Index dump: 23 <---> Index dump: 22 <---> Index dump: 4 <---> Index dump: 26 <---> Index dump: 6 <---> Index dump: 7 <---> Index dump: 7 <---> Index dump: 8 <---> Index dump: 26 <---> Index dump: 9 <---> Index dump: 34 <---> Index dump: 10 <---> Index dump: 10 <---> Index dump: 11 <---> Index dump: 9 <---> Index dump: 12 <---> Index dump: 25 <---> Index dump: 13 <---> Index dump: 13 <---> Index dump: 14 <---> Index dump: 12 <---> Index dump: 13 <---> Index dump: 25 <---> Index dump: 31 <---> Index dump: 31 <---> Index dump: 15 <---> Index dump: 13 <---> Index dump: 28 <---> Index dump: 33 <---> Index dump: 16 <---> Index dump: 36 <---> Index dump: 33 <---> Index dump: 35 <---> Index dump: 31 <---> Index dump: 24 <---> Index dump: 15 <---> Index dump: 17 <---> Index dump: 25 <---> Index dump: 18 <---> Index dump: 18 <---> Index dump: 25 <---> Index dump: 12 <---> Index dump: 27 <---> Index dump: 34 <---> Index dump: 9 <---> Index dump: 2 <---> Index dump: 1 <---> Index dump: 19 <---> Index dump: 30 <---> Index dump: 32 <---> Index dump: 20 <---> Index dump: 29 <---> Index dump: 25 <---> Index dump: 17 <---> Index dump: 17 <---> Index dump: 21 <---> Index dump: 29 <---> Index dump: 32 <---> Index dump: 26 <---> Index dump: 8 <---> Index dump: 8 <---> Index dump: 20 <---> Index dump: 32 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 <---> Index dump: 0 </code></pre> <p>This can be seen as the correct 72 values being copied in and 72 0's being copied in behind it. Did I do something wrong in the copying of my buffer or does this indicate a problem elsewhere?</p> <p>A further explanation:</p> <p>Mesh 1 - 72 indices Mesh 2 - 300 indices Mesh 3 - 45 indices.</p> <p>Using the function above, it produces a buffer that does this:</p> <p>[0]-[71] - Mesh 1 vertices all correct [72]-[142] - Empty [142]-[EndofBuffer] - Mesh 2</p> <p>It creates duplicate sizes filled with 0's.</p>

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