94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_OPENGL2_LENS_FLARE_H
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#define IGL_OPENGL2_LENS_FLARE_H
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#include "../igl_inline.h"
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#include "gl.h"
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#include <Eigen/Core>
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#include <vector>
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namespace igl
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{
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namespace opengl2
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{
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struct Flare{
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int type; /* flare texture index, 0..5 */
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float scale;
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float loc; /* position on axis */
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float color[3];
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Flare():
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type(-1),
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scale(0),
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loc(0)
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{}
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Flare(int type, float location, float scale, const float color[3], float colorScale) :
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type(type),
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scale(scale),
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loc(location)
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{
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this->color[0] = color[0] * colorScale;
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this->color[1] = color[1] * colorScale;
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this->color[2] = color[2] * colorScale;
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}
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};
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// Initialize shared data for lens flates
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//
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// Inputs:
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// start_id starting texture id location (should have at least id:id+16 free)
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// Outputs:
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// shine list of texture ids for shines
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// flare list of texture ids for flares
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IGL_INLINE void lens_flare_load_textures(
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std::vector<GLuint> & shine_ids,
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std::vector<GLuint> & flare_ids);
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// Create a set of lens flares
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//
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// Inputs:
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// A primary color
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// B secondary color
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// C secondary color
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// Outputs:
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// flares list of flare objects
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IGL_INLINE void lens_flare_create(
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const float * A,
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const float * B,
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const float * C,
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std::vector<Flare> & flares);
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// Draw lens flares
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//
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// Inputs:
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// flares list of Flare objects
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// shine_ids list of shine textures
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// flare_ids list of flare texture ids
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// light position of light
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// near_clip near clipping plane
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// shine_tic current "tic" in shine textures
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// Outputs:
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// shine_tic current "tic" in shine textures
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IGL_INLINE void lens_flare_draw(
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const std::vector<Flare> & flares,
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const std::vector<GLuint> & shine_ids,
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const std::vector<GLuint> & flare_ids,
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const Eigen::Vector3f & light,
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const float near_clip,
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int & shine_tic);
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}
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};
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#ifndef IGL_STATIC_LIBRARY
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# include "lens_flare.cpp"
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#endif
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#endif
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