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