public void GenerateGeometry(OpenGL gl, uint vertexAttributeLocation, uint normalAttributeLocation)
{
// Create the vertex array object. This will hold the state of all of the
// vertex buffer operations that follow it's binding, meaning instead of setting the
// vertex buffer data and binding it each time, we can just bind the array and call
// DrawElements - much easier.
vertexBufferArray = new VertexBufferArray();
vertexBufferArray.Create(gl);
vertexBufferArray.Bind(gl);
// Generate the vertices and normals.
CreateVertexNormalBuffer(gl, vertexAttributeLocation, normalAttributeLocation);
CreateIndexBuffer(gl);
vertexBufferArray.Unbind(gl);
}
public void Setup(OpenGL gl)
{
this.vertexBufferArray = new VertexBufferArray();
this.vertexBufferArray.Create(gl);
this.vertexBufferArray.Bind(gl);
var vertexDataBuffer = new VertexBuffer();
vertexDataBuffer.Create(gl);
vertexDataBuffer.Bind(gl);
vertexDataBuffer.SetData(gl, 0, this.vertexArray, false, 3);
var colourDataBuffer = new VertexBuffer();
colourDataBuffer.Create(gl);
colourDataBuffer.Bind(gl);
colourDataBuffer.SetData(gl, 1, this.colorArray, false, 4);
this.vertexBufferArray.Unbind(gl);
Debug.WriteLine("used " + (this.vertexArray.Length * 3 + this.colorArray.Length * 4) / 1000000 + " MB");
this.vertexArray = null;
this.colorArray = null;
this.isSetup = true;
}
private void CreateVertexBufferArray(OpenGL gl, Mesh mesh)
{
// Create and bind a vertex buffer array.
var vertexBufferArray = new VertexBufferArray();
vertexBufferArray.Create(gl);
vertexBufferArray.Bind(gl);
// Create a vertex buffer for the vertices.
var verticesVertexBuffer = new VertexBuffer();
verticesVertexBuffer.Create(gl);
verticesVertexBuffer.Bind(gl);
verticesVertexBuffer.SetData(gl, VertexAttributes.Position,
mesh.vertices.SelectMany(v => v.to_array()).ToArray(),
false, 3);
if (mesh.normals != null)
{
var normalsVertexBuffer = new VertexBuffer();
normalsVertexBuffer.Create(gl);
normalsVertexBuffer.Bind(gl);
normalsVertexBuffer.SetData(gl, VertexAttributes.Normal,
mesh.normals.SelectMany(v => v.to_array()).ToArray(),
false, 3);
}
if (mesh.uvs != null)
{
var texCoordsVertexBuffer = new VertexBuffer();
texCoordsVertexBuffer.Create(gl);
texCoordsVertexBuffer.Bind(gl);
texCoordsVertexBuffer.SetData(gl, VertexAttributes.TexCoord,
mesh.uvs.SelectMany(v => v.to_array()).ToArray(),
false, 2);
}
// We're done creating the vertex buffer array - unbind it and add it to the dictionary.
verticesVertexBuffer.Unbind(gl);
meshVertexBufferArrays[mesh] = vertexBufferArray;
}
void CreateAndPlotData(OpenGL GL, float[] raw_data, int figureID)
{
if (_dataTail[figureID] + raw_data.Length >= C_SAMPLES_PER_FRAME)
{
_dataTail[figureID] = 0; // Clear the buffer
}
AddVerticesToFigure(figureID, raw_data, _dataTail[figureID]);
// Create the vertex array object.
vertexBufferArray = new VertexBufferArray();
vertexBufferArray.Create(GL);
vertexBufferArray.Bind(GL);
// Create a vertex buffer for the vertex data.
var vertexDataBuffer = new VertexBuffer();
vertexDataBuffer.Create(GL);
vertexDataBuffer.Bind(GL);
vertexDataBuffer.SetData(GL, attribute_vpos, _data[figureID], false, 3);
// Now do the same for the colour data.
var colourDataBuffer = new VertexBuffer();
colourDataBuffer.Create(GL);
colourDataBuffer.Bind(GL);
colourDataBuffer.SetData(GL, attribute_vcol, _dataColor[figureID], false, 3);
// Unbind the vertex array, we've finished specifying data for it.
vertexBufferArray.Unbind(GL);
// Bind the shader, set the matrices.
shaderProgram.Bind(GL);
//shaderProgram.SetUniformMatrix4(gl, "projectionMatrix", projectionMatrix.to_array());
//shaderProgram.SetUniformMatrix4(gl, "viewMatrix", viewMatrix.to_array());
shaderProgram.SetUniformMatrix4(GL, "modelMatrix", mviewdata.to_array());
// Bind the out vertex array.
vertexBufferArray.Bind(GL);
// Draw the square.
GL.DrawArrays(OpenGL.GL_LINE_STRIP, 0, _dataTail[figureID]);
// Unbind our vertex array and shader.
vertexBufferArray.Unbind(GL);
shaderProgram.Unbind(GL);
}
void CreateAndDrawGrid(OpenGL GL)
{
// Debug.WriteLine("Painting Begins..");
// Create vertices for 4 lines that will split the figure into 3 equal sections
xgrid = new vec3[(C_NUM_Y_DIV + 1) * 2];
for (int i = 0; i < (C_NUM_Y_DIV + 1) * 2; i = i + 2)
{
xgrid[i].x = -1f; xgrid[i + 1].x = 1f;
xgrid[i].y = C_X_MARGIN_MIN + C_Y_STEP * i / 2; xgrid[i + 1].y = C_X_MARGIN_MIN + C_Y_STEP * i / 2;
xgrid[i].z = 0f; xgrid[i + 1].z = 0f;
}
coldata = new vec3[] {
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White),
GL.Color(DR.Color.White)
};
mviewdata = new mat4(1.0f);
// --------------- Implementation WITH VERTEX ARRAY OBJECTS --------------------
//// Create the vertex array object.
vertexBufferArray = new VertexBufferArray();
vertexBufferArray.Create(GL);
vertexBufferArray.Bind(GL);
// Create a vertex buffer for the vertex data.
var vertexDataBuffer = new VertexBuffer();
vertexDataBuffer.Create(GL);
vertexDataBuffer.Bind(GL);
vertexDataBuffer.SetData(GL, attribute_vpos, xgrid, false, 3);
// Now do the same for the colour data.
var colourDataBuffer = new VertexBuffer();
colourDataBuffer.Create(GL);
colourDataBuffer.Bind(GL);
colourDataBuffer.SetData(GL, attribute_vcol, coldata, false, 3);
// Unbind the vertex array, we've finished specifying data for it.
vertexBufferArray.Unbind(GL);
// Bind the shader, set the matrices.
shaderProgram.Bind(GL);
//shaderProgram.SetUniformMatrix4(gl, "projectionMatrix", projectionMatrix.to_array());
//shaderProgram.SetUniformMatrix4(gl, "viewMatrix", viewMatrix.to_array());
shaderProgram.SetUniformMatrix4(GL, "modelview", mviewdata.to_array());
// Bind the out vertex array.
vertexBufferArray.Bind(GL);
GL.DrawArrays(OpenGL.GL_LINES, 0, 8);
// Unbind our vertex array and shader.
vertexBufferArray.Unbind(GL);
shaderProgram.Unbind(GL);
// --------------- Implementation WITH VERTEX ARRAY OBJECTS END --------------------
}
/// <summary>
/// Creates the geometry for the square, also creating the vertex buffer array.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
private void CreateVerticesForSquare(OpenGL gl)
{
var vertices = new float[18];
var colors = new float[18]; // Colors for our vertices
vertices[0] = -0.5f; vertices[1] = -0.5f; vertices[2] = 0.0f; // Bottom left corner
colors[0] = 1.0f; colors[1] = 1.0f; colors[2] = 1.0f; // Bottom left corner
vertices[3] = -0.5f; vertices[4] = 0.5f; vertices[5] = 0.0f; // Top left corner
colors[3] = 1.0f; colors[4] = 0.0f; colors[5] = 0.0f; // Top left corner
vertices[6] = 0.5f; vertices[7] = 0.5f; vertices[8] = 0.0f; // Top Right corner
colors[6] = 0.0f; colors[7] = 1.0f; colors[8] = 0.0f; // Top Right corner
vertices[9] = 0.5f; vertices[10] = -0.5f; vertices[11] = 0.0f; // Bottom right corner
colors[9] = 0.0f; colors[10] = 0.0f; colors[11] = 1.0f; // Bottom right corner
vertices[12] = -0.5f; vertices[13] = -0.5f; vertices[14] = 0.0f; // Bottom left corner
colors[12] = 1.0f; colors[13] = 1.0f; colors[14] = 1.0f; // Bottom left corner
vertices[15] = 0.5f; vertices[16] = 0.5f; vertices[17] = 0.0f; // Top Right corner
colors[15] = 0.0f; colors[16] = 1.0f; colors[17] = 0.0f; // Top Right corner
// Create the vertex array object.
vertexBufferArray = new VertexBufferArray();
vertexBufferArray.Create(gl);
vertexBufferArray.Bind(gl);
// Create a vertex buffer for the vertex data.
var vertexDataBuffer = new VertexBuffer();
vertexDataBuffer.Create(gl);
vertexDataBuffer.Bind(gl);
vertexDataBuffer.SetData(gl, 0, vertices, false, 3);
// Now do the same for the colour data.
var colourDataBuffer = new VertexBuffer();
colourDataBuffer.Create(gl);
colourDataBuffer.Bind(gl);
colourDataBuffer.SetData(gl, 1, colors, false, 3);
// Unbind the vertex array, we've finished specifying data for it.
vertexBufferArray.Unbind(gl);
}
