WebSVN – gelsvn – Diff – /trunk/apps/MeshEdit/harmonics.cpp


/*
 *  harmonics.cpp
 *  GEL
 *
 *  Created by J. Andreas Bærentzen on 01/09/08.
 *  Copyright 2008 __MyCompanyName__. All rights reserved.
 *
 */
 
#include <iostream>
#include <CGLA/Vec3f.h>
#include <CGLA/Vec3d.h>
#include <LinAlg/Matrix.h>
#include <LinAlg/Vector.h>
#include <LinAlg/LapackFunc.h>
 
#include <GL/glew.h>
#include <GLGraphics/glsl_shader.h>
 
#include <HMesh/Manifold.h>
#include <HMesh/VertexCirculator.h>
#include <HMesh/FaceCirculator.h>
#include <HMesh/build_manifold.h>
#include <HMesh/mesh_optimization.h>
#include <HMesh/triangulate.h>
#include <HMesh/load.h>
#include <HMesh/x3d_save.h>
 
#include <GLConsole/GLConsole.h>
 
#include "harmonics.h"
 
using namespace CGLA;
using namespace std;
using namespace HMesh;
using namespace Geometry;
using namespace GLGraphics;
using namespace LinAlg;
 
bool Harmonics::is_initialized=false;
GLuint Harmonics::prog_P0;
 
 
namespace
{
 
	string vss =
"#version 120\n"
"#extension GL_EXT_gpu_shader4 : enable\n"
"	\n"
"	\n"
"	attribute float eigenvalue;\n"
"	attribute float eigenvalue2;\n"
"	varying vec3 normal;\n"
"	varying float eig;\n"
"	varying float eig2;\n"
"	\n"
"	void main(void)\n"
"	{\n"
"		gl_Position =  ftransform();\n"
"		normal = normalize(gl_NormalMatrix * gl_Normal);\n"
"		eig = eigenvalue;\n"
"		eig2 = eigenvalue2;\n"
"	}\n";
	
string fss = 	
"#version 120\n"
"#extension GL_EXT_gpu_shader4 : enable\n"
"	\n"
"	varying vec3 normal;\n"
"	varying float eig;\n"
"	varying float eig2;\n"
"	uniform float eig_max;\n"
"	uniform float eig_max2;\n"
"	uniform bool do_highlight;\n"
"	uniform bool do_diffuse;\n"
"	const vec3 light_dir = vec3(0,0,1);\n"
"	\n"
"	void main()\n"
"	{\n"
"		float dot_ln = dot(light_dir, normal);\n"
"		\n"
"		float eig_norm = eig/eig_max;\n"
"		float stripe_signal = 100 * eig_norm;\n"
"		vec4 stripe_col = abs(stripe_signal) < 3.14 ? vec4(1,1,0,0) : vec4(.1,.1,.1,0);\n"
"		\n"
"		gl_FragColor = eig_norm * vec4(-1,0,1,0);\n"
"		if(do_diffuse)   gl_FragColor *= dot_ln;\n"
"		if(do_highlight) gl_FragColor += dot_ln*dot_ln*dot_ln*dot_ln*dot_ln*dot_ln*dot_ln*vec4(.5,.5,.5,0);\n"
"		gl_FragColor += stripe_col * smoothstep(0.8,1.0,cos(stripe_signal));\n"
"	}\n";
	
	double voronoi_area(VertexIter v)
	{
	double area_mixed = 0;
	//For each triangle T from the 1-ring neighborhood of x
	for(VertexCirculator vc(v); !vc.end(); ++vc)
	{
		FaceIter f = vc.get_face();
		double f_area = area(f);
		
		HalfEdgeIter he = vc.get_halfedge();
		Vec3d v1(he->vert->pos);
		Vec3d v2(he->next->vert->pos);
		Vec3d v0(he->next->next->vert->pos);
		
		double a0 = acos(dot(v1-v0, v2-v0)/(length(v1-v0)*length(v2-v0)));
		double a1 = acos(dot(v2-v1, v0-v1)/(length(v2-v1)*length(v0-v1)));
		double a2 = acos(dot(v0-v2, v1-v2)/(length(v0-v2)*length(v1-v2)));
		
		if(a0>(M_PI/2.0) && a1>(M_PI/2.0) && a2>(M_PI/2.0)) // f is non-obtuse
		{
			// Add Voronoi formula (see Section 3.3)
			area_mixed += (1.0/8) * 
			((1.0/tan(a1)) * sqr_length(v2-v0) + 
			 (1.0/tan(a2)) * sqr_length(v1-v0));
		}
		else // Voronoi inappropriate
		{
			// Add either area(f)/4 or area(f)/2
			if(a0>M_PI/2.0)// the angle of f at x is obtuse
				area_mixed += f_area/2;
			else
				area_mixed += f_area/4;
		}
	}
	return area_mixed;
}
 
	double barycentric_area(VertexIter v)
	{
	double barea = 0;
	//For each triangle T from the 1-ring neighborhood of x
	for(VertexCirculator vc(v); !vc.end(); ++vc)
	{
		FaceIter f = vc.get_face();
		barea += area(f)/3.0;
	}
	return barea;
}
 
}
 
void Harmonics::make_laplace_operator()
{
	Q.Resize(mani.no_vertices(), mani.no_vertices());
	
	for(VertexIter v = mani.vertices_begin(); v != mani.vertices_end(); ++v)
		if(!is_boundary(v))
		{
			int i = v->touched;
			double area_i = voronoi_area(v);
			Vec3d vertex(v->pos);
			Vec3d curv_normal(0);
			double a_sum = 0;
			for(VertexCirculator vc(v); !vc.end(); ++vc)
			{
				int j = vc.get_vertex()->touched;
				double area_j = voronoi_area(vc.get_vertex());
				HalfEdgeIter h = vc.get_halfedge();
				Vec3d nbr(h->vert->pos);
				Vec3d left(h->next->vert->pos);
				Vec3d right(h->opp->prev->opp->vert->pos);
				
				double d_left = dot(normalize(nbr-left),
									normalize(vertex-left));
				double d_right = dot(normalize(nbr-right),
									 normalize(vertex-right));
				double a_left  = acos(min(1.0, max(-1.0, d_left)));
				double a_right = acos(min(1.0, max(-1.0, d_right)));
				
				double w = 1.0/tan(a_left) + 1.0/tan(a_right);
				
				Q[i][j] = -w/sqrt(area_i*area_j);						
				//Q[i][j] = -1;						
				a_sum += Q[i][j];
			}
			Q[i][i] = -a_sum;
		}
	EigenSolutionsSym(Q,V);
	
}
 
 
Harmonics::Harmonics(Manifold& _mani):mani(_mani)
{
	assert(is_initialized);
		
	triangulate(mani);
	mani.enumerate_vertices();
	maximum_eigenvalue = mani.no_vertices()-1;
	make_laplace_operator();
	
	proj.resize(maximum_eigenvalue);
	max_eig_values.resize(maximum_eigenvalue, 1e-10f);
 
	for(int es=0; es<maximum_eigenvalue; ++es)
	{
		proj[es] = Vec3d(0.0);
		for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)
		{
 
			proj[es] +=  Vec3d(v->pos) * Q[es][v->touched];
			max_eig_values[es] = max(max_eig_values[es], static_cast<float>(abs(Q[es][v->touched])));
		}
	}
}
 
void Harmonics::add_frequency(int es, float scale)
{
	if(es<maximum_eigenvalue)
		for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)
		{
			Vec3f p = Vec3f(proj[es]);
			double Qval = Q[es][v->touched];
			
			v->pos += p * Qval * scale; 	
		}
}
 
void Harmonics::reset_shape()
{
	for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)
		v->pos = Vec3f(0);	
}
void Harmonics::partial_reconstruct(int E0, int E1, float scale)
{
	for(int es=E0;es<=E1;++es)
		add_frequency(es, scale);
}
 
 
template<typename T>
T& get_CVar_ref(const std::string& s)
{
	return *reinterpret_cast<T*> (GetCVarData(s));
}
 
void Harmonics::parse_key(unsigned char key)
{
		int& display_eigenvalue = get_CVar_ref<int>("display.harmonics.eigenvalue");
		int& display_diffuse = get_CVar_ref<int>("display.harmonics.diffuse");
		int& display_highlight = get_CVar_ref<int>("display.harmonics.highlight");
		switch(key) {
			case '+': 
				display_eigenvalue = min(display_eigenvalue+1, maximum_eigenvalue); 
				break;
			case '-': 
				display_eigenvalue = max(display_eigenvalue-1, 0); 
				break;
			case 'd':	
				display_diffuse = !display_diffuse; 
				break;
			case 'h':
				display_highlight = !display_highlight;
				break;			
		}
 
}
 
void Harmonics::draw()
{
	int& display_eigen = get_CVar_ref<int>("display.harmonics.eigenvalue");
	int& display_eigen2 = get_CVar_ref<int>("display.harmonics.eigenvalue");
	int& do_diffuse = get_CVar_ref<int>("display.harmonics.diffuse");
	int& do_highlight = get_CVar_ref<int>("display.harmonics.highlight");
 
 
	glUseProgram(prog_P0);
	glUniform1f(glGetUniformLocation(prog_P0,"eig_max"),max_eig_values[display_eigen]);
	glUniform1f(glGetUniformLocation(prog_P0,"eig_max2"),max_eig_values[display_eigen2]);
	glUniform1i(glGetUniformLocation(prog_P0,"do_diffuse"),do_diffuse);
   	glUniform1i(glGetUniformLocation(prog_P0,"do_highlight"),do_highlight);
	GLuint attrib = glGetAttribLocationARB(prog_P0, "eigenvalue");
	GLuint attrib2 = glGetAttribLocationARB(prog_P0, "eigenvalue2");
	
	glFrontFace(GL_CW);
	for(FaceIter f=mani.faces_begin(); f != mani.faces_end(); ++f)
	{
		FaceCirculator fc(f);
		glBegin(GL_TRIANGLES);
		while(!fc.end())
		{
			int i = fc.get_vertex()->touched;
			glVertexAttrib1f(attrib,Q[display_eigen][i]);
			glVertexAttrib1f(attrib2,Q[display_eigen2][i]);
			glNormal3fv(normal(fc.get_vertex()).get());
			glVertex3fv(fc.get_vertex()->pos.get());
			++fc;
		}
		glEnd();
	}
	glFrontFace(GL_CCW);
	glUseProgram(0);
}
 
void Harmonics::init()
{
	is_initialized = true;
	string shader_path = "/Users/jab/GEL/apps/MeshEdit/";
	GLuint vs = create_glsl_shader(GL_VERTEX_SHADER, vss);
	GLuint fs = create_glsl_shader(GL_FRAGMENT_SHADER, fss);
	
	// Create the program
	prog_P0 = glCreateProgram();
	
	// Attach all shaders
	if(vs) glAttachShader(prog_P0, vs);
	if(fs) glAttachShader(prog_P0, fs);
	
	// Link the program object and print out the info log
	glLinkProgram(prog_P0);
	print_glsl_program_log(prog_P0);
	
	// Install program object as part of current state
	glUseProgram(0);
	
	static CVar<int> display_eigen("display.harmonics.eigenvalue",0);
	static CVar<int> display_eigen2("display.harmonics.eigenvalue2",0);
	static CVar<int> do_highlight("display.harmonics.highlight",1);
	static CVar<int> do_diffuse("display.harmonics.diffuse",1);
 
}
 

Rev 403	Rev 409
1	`/*`	1	`/*`
2	`* harmonics.cpp`	2	`* harmonics.cpp`
3	`* GEL`	3	`* GEL`
4	`*`	4	`*`
5	`* Created by J. Andreas Bærentzen on 01/09/08.`	5	`* Created by J. Andreas Bærentzen on 01/09/08.`
6	`* Copyright 2008 __MyCompanyName__. All rights reserved.`	6	`* Copyright 2008 __MyCompanyName__. All rights reserved.`
7	`*`	7	`*`
8	`*/`	8	`*/`
9		9
10	`#include <iostream>`	10	`#include <iostream>`
11	`#include <CGLA/Vec3f.h>`	11	`#include <CGLA/Vec3f.h>`
12	`#include <CGLA/Vec3d.h>`	12	`#include <CGLA/Vec3d.h>`
13	`#include <LinAlg/Matrix.h>`	13	`#include <LinAlg/Matrix.h>`
14	`#include <LinAlg/Vector.h>`	14	`#include <LinAlg/Vector.h>`
15	`#include <LinAlg/LapackFunc.h>`	15	`#include <LinAlg/LapackFunc.h>`
16		16
17	`#include <GL/glew.h>`	17	`#include <GL/glew.h>`
18	`#include <GLGraphics/glsl_shader.h>`	18	`#include <GLGraphics/glsl_shader.h>`
19		19
20	`#include <HMesh/Manifold.h>`	20	`#include <HMesh/Manifold.h>`
21	`#include <HMesh/VertexCirculator.h>`	21	`#include <HMesh/VertexCirculator.h>`
22	`#include <HMesh/FaceCirculator.h>`	22	`#include <HMesh/FaceCirculator.h>`
23	`#include <HMesh/build_manifold.h>`	23	`#include <HMesh/build_manifold.h>`
24	`#include <HMesh/mesh_optimization.h>`	24	`#include <HMesh/mesh_optimization.h>`
25	`#include <HMesh/triangulate.h>`	25	`#include <HMesh/triangulate.h>`
26	`#include <HMesh/load.h>`	26	`#include <HMesh/load.h>`
27	`#include <HMesh/x3d_save.h>`	27	`#include <HMesh/x3d_save.h>`
28		28
29	`#include <GLConsole/GLConsole.h>`	29	`#include <GLConsole/GLConsole.h>`
30		30
31	`#include "harmonics.h"`	31	`#include "harmonics.h"`
32		32
33	`using namespace CGLA;`	33	`using namespace CGLA;`
34	`using namespace std;`	34	`using namespace std;`
35	`using namespace HMesh;`	35	`using namespace HMesh;`
36	`using namespace Geometry;`	36	`using namespace Geometry;`
37	`using namespace GLGraphics;`	37	`using namespace GLGraphics;`
38	`using namespace LinAlg;`	38	`using namespace LinAlg;`
39		39
40	`bool Harmonics::is_initialized=false;`	40	`bool Harmonics::is_initialized=false;`
41	`GLuint Harmonics::prog_P0;`	41	`GLuint Harmonics::prog_P0;`
42		42
43		43
44	`namespace`	44	`namespace`
45	`{`	45	`{`
46		46
47	`string vss =`	47	`string vss =`
48	`"#version 120\n"`	48	`"#version 120\n"`
49	`"#extension GL_EXT_gpu_shader4 : enable\n"`	49	`"#extension GL_EXT_gpu_shader4 : enable\n"`
50	`" \n"`	50	`" \n"`
51	`" \n"`	51	`" \n"`
52	`" attribute float eigenvalue;\n"`	52	`" attribute float eigenvalue;\n"`
53	`" attribute float eigenvalue2;\n"`	53	`" attribute float eigenvalue2;\n"`
54	`" varying vec3 normal;\n"`	54	`" varying vec3 normal;\n"`
55	`" varying float eig;\n"`	55	`" varying float eig;\n"`
56	`" varying float eig2;\n"`	56	`" varying float eig2;\n"`
57	`" \n"`	57	`" \n"`
58	`" void main(void)\n"`	58	`" void main(void)\n"`
59	`" {\n"`	59	`" {\n"`
60	`" gl_Position = ftransform();\n"`	60	`" gl_Position = ftransform();\n"`
61	`" normal = normalize(gl_NormalMatrix * gl_Normal);\n"`	61	`" normal = normalize(gl_NormalMatrix * gl_Normal);\n"`
62	`" eig = eigenvalue;\n"`	62	`" eig = eigenvalue;\n"`
63	`" eig2 = eigenvalue2;\n"`	63	`" eig2 = eigenvalue2;\n"`
64	`" }\n";`	64	`" }\n";`
65		65
66	`string fss =`	66	`string fss =`
67	`"#version 120\n"`	67	`"#version 120\n"`
68	`"#extension GL_EXT_gpu_shader4 : enable\n"`	68	`"#extension GL_EXT_gpu_shader4 : enable\n"`
69	`" \n"`	69	`" \n"`
70	`" varying vec3 normal;\n"`	70	`" varying vec3 normal;\n"`
71	`" varying float eig;\n"`	71	`" varying float eig;\n"`
72	`" varying float eig2;\n"`	72	`" varying float eig2;\n"`
73	`" uniform float eig_max;\n"`	73	`" uniform float eig_max;\n"`
74	`" uniform float eig_max2;\n"`	74	`" uniform float eig_max2;\n"`
75	`" uniform bool do_highlight;\n"`	75	`" uniform bool do_highlight;\n"`
76	`" uniform bool do_diffuse;\n"`	76	`" uniform bool do_diffuse;\n"`
77	`" const vec3 light_dir = vec3(0,0,1);\n"`	77	`" const vec3 light_dir = vec3(0,0,1);\n"`
78	`" \n"`	78	`" \n"`
79	`" void main()\n"`	79	`" void main()\n"`
80	`" {\n"`	80	`" {\n"`
81	`" float dot_ln = dot(light_dir, normal);\n"`	81	`" float dot_ln = dot(light_dir, normal);\n"`
82	`" \n"`	82	`" \n"`
83	`" float eig_norm = eig/eig_max;\n"`	83	`" float eig_norm = eig/eig_max;\n"`
84	`" float stripe_signal = 100 * eig_norm;\n"`	84	`" float stripe_signal = 100 * eig_norm;\n"`
85	`" vec4 stripe_col = abs(stripe_signal) < 3.14 ? vec4(1,1,0,0) : vec4(.1,.1,.1,0);\n"`	85	`" vec4 stripe_col = abs(stripe_signal) < 3.14 ? vec4(1,1,0,0) : vec4(.1,.1,.1,0);\n"`
86	`" \n"`	86	`" \n"`
87	`" gl_FragColor = eig_norm * vec4(-1,0,1,0);\n"`	87	`" gl_FragColor = eig_norm * vec4(-1,0,1,0);\n"`
88	`" if(do_diffuse) gl_FragColor *= dot_ln;\n"`	88	`" if(do_diffuse) gl_FragColor *= dot_ln;\n"`
89	`" if(do_highlight) gl_FragColor += dot_lndot_lndot_lndot_lndot_lndot_lndot_ln*vec4(.5,.5,.5,0);\n"`	89	`" if(do_highlight) gl_FragColor += dot_lndot_lndot_lndot_lndot_lndot_lndot_ln*vec4(.5,.5,.5,0);\n"`
90	`" gl_FragColor += stripe_col * smoothstep(0.8,1.0,cos(stripe_signal));\n"`	90	`" gl_FragColor += stripe_col * smoothstep(0.8,1.0,cos(stripe_signal));\n"`
91	`" }\n";`	91	`" }\n";`
92		92
93	`double voronoi_area(VertexIter v)`	93	`double voronoi_area(VertexIter v)`
94	`{`	94	`{`
95	`double area_mixed = 0;`	95	`double area_mixed = 0;`
96	`//For each triangle T from the 1-ring neighborhood of x`	96	`//For each triangle T from the 1-ring neighborhood of x`
97	`for(VertexCirculator vc(v); !vc.end(); ++vc)`	97	`for(VertexCirculator vc(v); !vc.end(); ++vc)`
98	`{`	98	`{`
99	`FaceIter f = vc.get_face();`	99	`FaceIter f = vc.get_face();`
100	`double f_area = area(f);`	100	`double f_area = area(f);`
101		101
102	`HalfEdgeIter he = vc.get_halfedge();`	102	`HalfEdgeIter he = vc.get_halfedge();`
103	`Vec3d v1(he->vert->pos);`	103	`Vec3d v1(he->vert->pos);`
104	`Vec3d v2(he->next->vert->pos);`	104	`Vec3d v2(he->next->vert->pos);`
105	`Vec3d v0(he->next->next->vert->pos);`	105	`Vec3d v0(he->next->next->vert->pos);`
106		106
107	`double a0 = acos(dot(v1-v0, v2-v0)/(length(v1-v0)*length(v2-v0)));`	107	`double a0 = acos(dot(v1-v0, v2-v0)/(length(v1-v0)*length(v2-v0)));`
108	`double a1 = acos(dot(v2-v1, v0-v1)/(length(v2-v1)*length(v0-v1)));`	108	`double a1 = acos(dot(v2-v1, v0-v1)/(length(v2-v1)*length(v0-v1)));`
109	`double a2 = acos(dot(v0-v2, v1-v2)/(length(v0-v2)*length(v1-v2)));`	109	`double a2 = acos(dot(v0-v2, v1-v2)/(length(v0-v2)*length(v1-v2)));`
110		110
111	`if(a0>(M_PI/2.0) && a1>(M_PI/2.0) && a2>(M_PI/2.0)) // f is non-obtuse`	111	`if(a0>(M_PI/2.0) && a1>(M_PI/2.0) && a2>(M_PI/2.0)) // f is non-obtuse`
112	`{`	112	`{`
113	`// Add Voronoi formula (see Section 3.3)`	113	`// Add Voronoi formula (see Section 3.3)`
114	`area_mixed += (1.0/8) *`	114	`area_mixed += (1.0/8) *`
115	`((1.0/tan(a1)) * sqr_length(v2-v0) +`	115	`((1.0/tan(a1)) * sqr_length(v2-v0) +`
116	`(1.0/tan(a2)) * sqr_length(v1-v0));`	116	`(1.0/tan(a2)) * sqr_length(v1-v0));`
117	`}`	117	`}`
118	`else // Voronoi inappropriate`	118	`else // Voronoi inappropriate`
119	`{`	119	`{`
120	`// Add either area(f)/4 or area(f)/2`	120	`// Add either area(f)/4 or area(f)/2`
121	`if(a0>M_PI/2.0)// the angle of f at x is obtuse`	121	`if(a0>M_PI/2.0)// the angle of f at x is obtuse`
122	`area_mixed += f_area/2;`	122	`area_mixed += f_area/2;`
123	`else`	123	`else`
124	`area_mixed += f_area/4;`	124	`area_mixed += f_area/4;`
125	`}`	125	`}`
126	`}`	126	`}`
127	`return area_mixed;`	127	`return area_mixed;`
128	`}`	128	`}`
129		129
130	`double barycentric_area(VertexIter v)`	130	`double barycentric_area(VertexIter v)`
131	`{`	131	`{`
132	`double barea = 0;`	132	`double barea = 0;`
133	`//For each triangle T from the 1-ring neighborhood of x`	133	`//For each triangle T from the 1-ring neighborhood of x`
134	`for(VertexCirculator vc(v); !vc.end(); ++vc)`	134	`for(VertexCirculator vc(v); !vc.end(); ++vc)`
135	`{`	135	`{`
136	`FaceIter f = vc.get_face();`	136	`FaceIter f = vc.get_face();`
137	`barea += area(f)/3.0;`	137	`barea += area(f)/3.0;`
138	`}`	138	`}`
139	`return barea;`	139	`return barea;`
140	`}`	140	`}`
141		141
142	`}`	142	`}`
143		143
144	`void Harmonics::make_laplace_operator()`	144	`void Harmonics::make_laplace_operator()`
145	`{`	145	`{`
146	`Q.Resize(mani.no_vertices(), mani.no_vertices());`	146	`Q.Resize(mani.no_vertices(), mani.no_vertices());`
147		147
148	`for(VertexIter v = mani.vertices_begin(); v != mani.vertices_end(); ++v)`	148	`for(VertexIter v = mani.vertices_begin(); v != mani.vertices_end(); ++v)`
149	`if(!is_boundary(v))`	149	`if(!is_boundary(v))`
150	`{`	150	`{`
151	`int i = v->touched;`	151	`int i = v->touched;`
152	`double area_i = voronoi_area(v);`	152	`double area_i = voronoi_area(v);`
153	`Vec3d vertex(v->pos);`	153	`Vec3d vertex(v->pos);`
154	`Vec3d curv_normal(0);`	154	`Vec3d curv_normal(0);`
155	`double a_sum = 0;`	155	`double a_sum = 0;`
156	`for(VertexCirculator vc(v); !vc.end(); ++vc)`	156	`for(VertexCirculator vc(v); !vc.end(); ++vc)`
157	`{`	157	`{`
158	`int j = vc.get_vertex()->touched;`	158	`int j = vc.get_vertex()->touched;`
159	`double area_j = voronoi_area(vc.get_vertex());`	159	`double area_j = voronoi_area(vc.get_vertex());`
160	`HalfEdgeIter h = vc.get_halfedge();`	160	`HalfEdgeIter h = vc.get_halfedge();`
161	`Vec3d nbr(h->vert->pos);`	161	`Vec3d nbr(h->vert->pos);`
162	`Vec3d left(h->next->vert->pos);`	162	`Vec3d left(h->next->vert->pos);`
163	`Vec3d right(h->opp->prev->opp->vert->pos);`	163	`Vec3d right(h->opp->prev->opp->vert->pos);`
164		164
165	`double d_left = dot(normalize(nbr-left),`	165	`double d_left = dot(normalize(nbr-left),`
166	`normalize(vertex-left));`	166	`normalize(vertex-left));`
167	`double d_right = dot(normalize(nbr-right),`	167	`double d_right = dot(normalize(nbr-right),`
168	`normalize(vertex-right));`	168	`normalize(vertex-right));`
169	`double a_left = acos(min(1.0, max(-1.0, d_left)));`	169	`double a_left = acos(min(1.0, max(-1.0, d_left)));`
170	`double a_right = acos(min(1.0, max(-1.0, d_right)));`	170	`double a_right = acos(min(1.0, max(-1.0, d_right)));`
171		171
172	`double w = 1.0/tan(a_left) + 1.0/tan(a_right);`	172	`double w = 1.0/tan(a_left) + 1.0/tan(a_right);`
173		173
174	`Q[i][j] = -w/sqrt(area_i*area_j);`	174	`Q[i][j] = -w/sqrt(area_i*area_j);`
175	`//Q[i][j] = -1;`	175	`//Q[i][j] = -1;`
176	`a_sum += Q[i][j];`	176	`a_sum += Q[i][j];`
177	`}`	177	`}`
178	`Q[i][i] = -a_sum;`	178	`Q[i][i] = -a_sum;`
179	`}`	179	`}`
180	`EigenSolutionsSym(Q,V);`	180	`EigenSolutionsSym(Q,V);`
181		181
182	`}`	182	`}`
183		183
184		184
185	`Harmonics::Harmonics(Manifold& _mani):mani(_mani)`	185	`Harmonics::Harmonics(Manifold& _mani):mani(_mani)`
186	`{`	186	`{`
187	`assert(is_initialized);`	187	`assert(is_initialized);`
188		188
189	`triangulate(mani);`	189	`triangulate(mani);`
190	`mani.enumerate_vertices();`	190	`mani.enumerate_vertices();`
191	`maximum_eigenvalue = mani.no_vertices()-1;`	191	`maximum_eigenvalue = mani.no_vertices()-1;`
192	`make_laplace_operator();`	192	`make_laplace_operator();`
193		193
194	`proj.resize(maximum_eigenvalue);`	194	`proj.resize(maximum_eigenvalue);`
195	`max_eig_values.resize(maximum_eigenvalue, 1e-10);`	195	`max_eig_values.resize(maximum_eigenvalue, 1e-10f);`
196		196
197	`for(int es=0; es<maximum_eigenvalue; ++es)`	197	`for(int es=0; es<maximum_eigenvalue; ++es)`
198	`{`	198	`{`
199	`proj[es] = Vec3d(0.0);`	199	`proj[es] = Vec3d(0.0);`
200	`for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)`	200	`for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)`
201	`{`	201	`{`
202		202
203	`proj[es] += Vec3d(v->pos) * Q[es][v->touched];`	203	`proj[es] += Vec3d(v->pos) * Q[es][v->touched];`
204	`max_eig_values[es] = max(max_eig_values[es], static_cast<float>(abs(Q[es][v->touched])));`	204	`max_eig_values[es] = max(max_eig_values[es], static_cast<float>(abs(Q[es][v->touched])));`
205	`}`	205	`}`
206	`}`	206	`}`
207	`}`	207	`}`
208		208
209	`void Harmonics::add_frequency(int es, float scale)`	209	`void Harmonics::add_frequency(int es, float scale)`
210	`{`	210	`{`
211	`if(es<maximum_eigenvalue)`	211	`if(es<maximum_eigenvalue)`
212	`for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)`	212	`for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)`
213	`{`	213	`{`
214	`Vec3f p = Vec3f(proj[es]);`	214	`Vec3f p = Vec3f(proj[es]);`
215	`double Qval = Q[es][v->touched];`	215	`double Qval = Q[es][v->touched];`
216		216
217	`v->pos += p * Qval * scale;`	217	`v->pos += p * Qval * scale;`
218	`}`	218	`}`
219	`}`	219	`}`
220		220
221	`void Harmonics::reset_shape()`	221	`void Harmonics::reset_shape()`
222	`{`	222	`{`
223	`for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)`	223	`for(VertexIter v=mani.vertices_begin(); v != mani.vertices_end(); ++v)`
224	`v->pos = Vec3f(0);`	224	`v->pos = Vec3f(0);`
225	`}`	225	`}`
226	`void Harmonics::partial_reconstruct(int E0, int E1, float scale)`	226	`void Harmonics::partial_reconstruct(int E0, int E1, float scale)`
227	`{`	227	`{`
228	`for(int es=E0;es<=E1;++es)`	228	`for(int es=E0;es<=E1;++es)`
229	`add_frequency(es, scale);`	229	`add_frequency(es, scale);`
230	`}`	230	`}`
231		231
232		232
233	`template<typename T>`	233	`template<typename T>`
234	`T& get_CVar_ref(const std::string& s)`	234	`T& get_CVar_ref(const std::string& s)`
235	`{`	235	`{`
236	`return reinterpret_cast<T> (GetCVarData(s));`	236	`return reinterpret_cast<T> (GetCVarData(s));`
237	`}`	237	`}`
238		238
239	`void Harmonics::parse_key(unsigned char key)`	239	`void Harmonics::parse_key(unsigned char key)`
240	`{`	240	`{`
241	`int& display_eigenvalue = get_CVar_ref<int>("display.harmonics.eigenvalue");`	241	`int& display_eigenvalue = get_CVar_ref<int>("display.harmonics.eigenvalue");`
242	`int& display_diffuse = get_CVar_ref<int>("display.harmonics.diffuse");`	242	`int& display_diffuse = get_CVar_ref<int>("display.harmonics.diffuse");`
243	`int& display_highlight = get_CVar_ref<int>("display.harmonics.highlight");`	243	`int& display_highlight = get_CVar_ref<int>("display.harmonics.highlight");`
244	`switch(key) {`	244	`switch(key) {`
245	`case '+':`	245	`case '+':`
246	`display_eigenvalue = min(display_eigenvalue+1, maximum_eigenvalue);`	246	`display_eigenvalue = min(display_eigenvalue+1, maximum_eigenvalue);`
247	`break;`	247	`break;`
248	`case '-':`	248	`case '-':`
249	`display_eigenvalue = max(display_eigenvalue-1, 0);`	249	`display_eigenvalue = max(display_eigenvalue-1, 0);`
250	`break;`	250	`break;`
251	`case 'd':`	251	`case 'd':`
252	`display_diffuse = !display_diffuse;`	252	`display_diffuse = !display_diffuse;`
253	`break;`	253	`break;`
254	`case 'h':`	254	`case 'h':`
255	`display_highlight = !display_highlight;`	255	`display_highlight = !display_highlight;`
256	`break;`	256	`break;`
257	`}`	257	`}`
258		258
259	`}`	259	`}`
260		260
261	`void Harmonics::draw()`	261	`void Harmonics::draw()`
262	`{`	262	`{`
263	`int& display_eigen = get_CVar_ref<int>("display.harmonics.eigenvalue");`	263	`int& display_eigen = get_CVar_ref<int>("display.harmonics.eigenvalue");`
264	`int& display_eigen2 = get_CVar_ref<int>("display.harmonics.eigenvalue");`	264	`int& display_eigen2 = get_CVar_ref<int>("display.harmonics.eigenvalue");`
265	`int& do_diffuse = get_CVar_ref<int>("display.harmonics.diffuse");`	265	`int& do_diffuse = get_CVar_ref<int>("display.harmonics.diffuse");`
266	`int& do_highlight = get_CVar_ref<int>("display.harmonics.highlight");`	266	`int& do_highlight = get_CVar_ref<int>("display.harmonics.highlight");`
267		267
268		268
269	`glUseProgram(prog_P0);`	269	`glUseProgram(prog_P0);`
270	`glUniform1f(glGetUniformLocation(prog_P0,"eig_max"),max_eig_values[display_eigen]);`	270	`glUniform1f(glGetUniformLocation(prog_P0,"eig_max"),max_eig_values[display_eigen]);`
271	`glUniform1f(glGetUniformLocation(prog_P0,"eig_max2"),max_eig_values[display_eigen2]);`	271	`glUniform1f(glGetUniformLocation(prog_P0,"eig_max2"),max_eig_values[display_eigen2]);`
272	`glUniform1i(glGetUniformLocation(prog_P0,"do_diffuse"),do_diffuse);`	272	`glUniform1i(glGetUniformLocation(prog_P0,"do_diffuse"),do_diffuse);`
273	`glUniform1i(glGetUniformLocation(prog_P0,"do_highlight"),do_highlight);`	273	`glUniform1i(glGetUniformLocation(prog_P0,"do_highlight"),do_highlight);`
274	`GLuint attrib = glGetAttribLocationARB(prog_P0, "eigenvalue");`	274	`GLuint attrib = glGetAttribLocationARB(prog_P0, "eigenvalue");`
275	`GLuint attrib2 = glGetAttribLocationARB(prog_P0, "eigenvalue2");`	275	`GLuint attrib2 = glGetAttribLocationARB(prog_P0, "eigenvalue2");`
276		276
277	`glFrontFace(GL_CW);`	277	`glFrontFace(GL_CW);`
278	`for(FaceIter f=mani.faces_begin(); f != mani.faces_end(); ++f)`	278	`for(FaceIter f=mani.faces_begin(); f != mani.faces_end(); ++f)`
279	`{`	279	`{`
280	`FaceCirculator fc(f);`	280	`FaceCirculator fc(f);`
281	`glBegin(GL_TRIANGLES);`	281	`glBegin(GL_TRIANGLES);`
282	`while(!fc.end())`	282	`while(!fc.end())`
283	`{`	283	`{`
284	`int i = fc.get_vertex()->touched;`	284	`int i = fc.get_vertex()->touched;`
285	`glVertexAttrib1f(attrib,Q[display_eigen][i]);`	285	`glVertexAttrib1f(attrib,Q[display_eigen][i]);`
286	`glVertexAttrib1f(attrib2,Q[display_eigen2][i]);`	286	`glVertexAttrib1f(attrib2,Q[display_eigen2][i]);`
287	`glNormal3fv(normal(fc.get_vertex()).get());`	287	`glNormal3fv(normal(fc.get_vertex()).get());`
288	`glVertex3fv(fc.get_vertex()->pos.get());`	288	`glVertex3fv(fc.get_vertex()->pos.get());`
289	`++fc;`	289	`++fc;`
290	`}`	290	`}`
291	`glEnd();`	291	`glEnd();`
292	`}`	292	`}`
293	`glFrontFace(GL_CCW);`	293	`glFrontFace(GL_CCW);`
294	`glUseProgram(0);`	294	`glUseProgram(0);`
295	`}`	295	`}`
296		296
297	`void Harmonics::init()`	297	`void Harmonics::init()`
298	`{`	298	`{`
299	`is_initialized = true;`	299	`is_initialized = true;`
300	`string shader_path = "/Users/jab/GEL/apps/MeshEdit/";`	300	`string shader_path = "/Users/jab/GEL/apps/MeshEdit/";`
301	`GLuint vs = create_glsl_shader(GL_VERTEX_SHADER, vss);`	301	`GLuint vs = create_glsl_shader(GL_VERTEX_SHADER, vss);`
302	`GLuint fs = create_glsl_shader(GL_FRAGMENT_SHADER, fss);`	302	`GLuint fs = create_glsl_shader(GL_FRAGMENT_SHADER, fss);`
303		303
304	`// Create the program`	304	`// Create the program`
305	`prog_P0 = glCreateProgram();`	305	`prog_P0 = glCreateProgram();`
306		306
307	`// Attach all shaders`	307	`// Attach all shaders`
308	`if(vs) glAttachShader(prog_P0, vs);`	308	`if(vs) glAttachShader(prog_P0, vs);`
309	`if(fs) glAttachShader(prog_P0, fs);`	309	`if(fs) glAttachShader(prog_P0, fs);`
310		310
311	`// Link the program object and print out the info log`	311	`// Link the program object and print out the info log`
312	`glLinkProgram(prog_P0);`	312	`glLinkProgram(prog_P0);`
313	`print_glsl_program_log(prog_P0);`	313	`print_glsl_program_log(prog_P0);`
314		314
315	`// Install program object as part of current state`	315	`// Install program object as part of current state`
316	`glUseProgram(0);`	316	`glUseProgram(0);`
317		317
318	`static CVar<int> display_eigen("display.harmonics.eigenvalue",0);`	318	`static CVar<int> display_eigen("display.harmonics.eigenvalue",0);`
319	`static CVar<int> display_eigen2("display.harmonics.eigenvalue2",0);`	319	`static CVar<int> display_eigen2("display.harmonics.eigenvalue2",0);`
320	`static CVar<int> do_highlight("display.harmonics.highlight",1);`	320	`static CVar<int> do_highlight("display.harmonics.highlight",1);`
321	`static CVar<int> do_diffuse("display.harmonics.diffuse",1);`	321	`static CVar<int> do_diffuse("display.harmonics.diffuse",1);`
322		322
323	`}`	323	`}`
324		324

Subversion Repositories gelsvn

(root)/trunk/apps/MeshEdit/harmonics.cpp – Rev 403 → 409