59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
//
|
|
// This source code is property of the Computer Graphics and Visualization
|
|
// chair of the TU Dresden. Do not distribute in modified or unmodified form!
|
|
// Copyright (C) 2016 CGV TU Dresden - All Rights Reserved
|
|
//
|
|
/*************************************************************************
|
|
The curve renderer.
|
|
This class is responsible for rendering curves using OpenGL. The curve
|
|
to render must implement the interface "abstract_curve" and is provided
|
|
via the "set_curve" method. The method "render_curve" performs the
|
|
rendering. Whenever the curve changes the method "sample_curve" is called
|
|
which samples the curve at equidistant intervals of the domain parameter "t".
|
|
The number of samples can be specified using the parameter "sample_count".
|
|
For rendering the basis functions the method "render_basis_functions" is
|
|
provided which also invokes the method "render_basis_axes" for rendering
|
|
the coordinate system.
|
|
*************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
// provides the abstract curve interface
|
|
#include "abstract_curve.h"
|
|
|
|
class curve_renderer
|
|
{
|
|
public:
|
|
// Initialize the curve renderer
|
|
curve_renderer();
|
|
|
|
// Sample the curve using "sample_count" samples and store the
|
|
// result in the list "samples".
|
|
|
|
void sample_curve(int sample_count);
|
|
// Set the active curve to render
|
|
void set_curve(abstract_curve *curve);
|
|
|
|
|
|
// Render the curve
|
|
void render_curve();
|
|
|
|
// Render the basis functions
|
|
void render_basis_functions();
|
|
|
|
private:
|
|
// The curve to render
|
|
abstract_curve *curve;
|
|
|
|
// A list of samples of the curve
|
|
std::vector<point2d> samples;
|
|
|
|
// The width and height of the coordinate system of the basis functions
|
|
int basis_width, basis_height;
|
|
|
|
|
|
// Render the basis functions coordinate system
|
|
void render_basis_axes();
|
|
// Set an OpenGL color for a basis function "i"
|
|
void set_basis_color(int i);
|
|
}; |