GlVertexAttribPointer(vertexLocation, 3, GL_FLOAT, GL_FALSE, sizeof(vertexData), NULL) VertexData *verts = new vertexData įor(size_t i = 0 i attributeLocation('vertex') Size_t numVerts = 6 * ANGLE_COUNT * RANGE_COUNT You need an extra-buffer for your colors, the index-buffer (element-array-buffer) just indexes the vertices (connects vertices to triangles so to speak).įull example (I only know how to manage an interleaved buffer-layout atm, so I changed the data setup a bit, also I do not use an index buffer since I assume the vertices are already layed out the way triangles would be painted): struct vertexData Use GL_ARRAY_BUFFER instead of GL_COLOR_ARRAY. So far for the theory, now to your code: // Transfer index data to VBO 1 The size of the index-buffer should be divisable by three if you draw triangles. Note that the vertex-buffer must have the same length as the color-buffer. One for the vertex-coordinates, one for the vertex-indices and one for your colors. Besides, when I transfer colors and vertices to VBO, imagine now I want to change the value of some indices of colors variables, how can I do that? I do not understand why this program cannot run.

GlDrawArrays(GL_TRIANGLES, 0, vertices.size()) GlBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) glDrawElements(GL_TRIANGLES, 6 * ANGLE_COUNT * RANGE_COUNT, GL_UNSIGNED_SHORT, 0) GlVertexAttribPointer(Color, 2, GL_FLOAT, GL_FALSE, 6 * ANGLE_COUNT * RANGE_COUNT *sizeof(colors), 0) ShaderProgram->enableAttributeArray(Color) Int Color = shaderProgram->attributeLocation('color') GlVertexAttribPointer(vertexLocation, 3, GL_FLOAT, GL_FALSE, 6 * ANGLE_COUNT * RANGE_COUNT * sizeof(nstData()), (const void *)0) ShaderProgram->enableAttributeArray(vertexLocation) Int vertexLocation = shaderProgram->attributeLocation('vertex') GlBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboIds) Rendering function: glBindBuffer(GL_ARRAY_BUFFER, vboIds) So far, I initialized vertices as an array buffer to the mentioned length as well as the colors buffer. GlBufferData(GL_COLOR_ARRAY, 6 * ANGLE_COUNT * RANGE_COUNT * sizeof(GLushort), colors, GL_STATIC_DRAW) GlBufferData(GL_ARRAY_BUFFER, 6 * ANGLE_COUNT * RANGE_COUNT * sizeof(QVector3D), nstData(), GL_STATIC_DRAW) The length of the vertices array is (6 * ANGLE_COUNT=360 * RANGE_COUNT=100) initializeGLFunctions() I am confused, I did everything to run this program but still gives me a segmentation fault. The purpose is to transfer both color and vertices variables to VBO (GPU). Besides to convert vertices to VBO I used GL_ARRAY_BUFFER. Using BSL shaders, had tested multiple versions of the shader itself to see if that was the problem, but using the current 8.0.01, and previous v 8.0 that I had working fine in minecraft 1.16.Should I use the GL_COLOR_ARRAY to convert colors to VBO? I did use this in my code.

Vindictus vertex buffer error fix