On Tue, 1 May 2018 15:23:25 +0700 Ryan Joseph <r...@thealchemistguild.com> wrote:
>[...] > what do we do for records then? We often need to pass arrays of specific > types for functions such as glBufferData. > > type > TVec2f = record > x, y: GLfloat; > end; > > type > TVec2b = record > x, y: GLubyte; > end; > > var > verts: array[0..2] of TVec2f; > begin > glBufferData(GL_ARRAY_BUFFER, sizeof(TVec2f) * 3, @verts, GL_STATIC_DRAW); > // pass an array of TVec2 but how does JS know this? Here is an JS example: ---JS-START--- var vertices = [-0.5, 0.5, -0.5, -0.5, 0.0, -0.5,]; // Create a new buffer object var vertex_buffer = gl.createBuffer(); // Bind an empty array buffer to it gl.bindBuffer(gl.ARRAY_BUFFER, vertex_buffer); // Pass the vertices data to the buffer gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW); // Unbind the buffer gl.bindBuffer(gl.ARRAY_BUFFER, null); ---JS-END--- In pas2js it will probably look similar to this: var vertices: array of glfloat = (-0.5, 0.5, -0.5, -0.5, 0.0, -0.5); var vertex_buffer: TInsertNameHere; begin // Create a new buffer object vertex_buffer = gl.createBuffer(); // Bind an empty array buffer to it gl.bindBuffer(gl.ARRAY_BUFFER, vertex_buffer); // Pass the vertices data to the buffer gl.bufferData(gl.ARRAY_BUFFER, Float32Array.new(vertices), gl.STATIC_DRAW); // Unbind the buffer gl.bindBuffer(gl.ARRAY_BUFFER, nil); end; Mattias _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
