LineFieldRenderer::LineFieldRenderer(const Manifold& m, bool smooth, VertexAttributeVector<Vec3d>& lines, float _r):
SimpleShaderRenderer(vss,fss), r(_r)
{
float noise_scale = 10.0f/r;
float line_scale = 0.003f;
GLint old_prog;
glGetIntegerv(GL_CURRENT_PROGRAM, &old_prog);
glUseProgram(prog);
glUniform1fARB(glGetUniformLocationARB(prog, "scale_line"),line_scale*noise_scale);
glUniform1fARB(glGetUniformLocationARB(prog, "noise_scale"),noise_scale);
glUniform1iARB(glGetUniformLocationARB(prog, "noise_tex"),0);
GLuint direction = glGetAttribLocation(prog, "direction");
glNewList(display_list,GL_COMPILE);
for(FaceIDIterator f = m.faces_begin(); f != m.faces_end(); ++f) {
if(!smooth)
glNormal3dv(normal(m, *f).get());
if(no_edges(m, *f) == 3)
glBegin(GL_TRIANGLES);
else
glBegin(GL_POLYGON);
for(Walker w = m.walker(*f); !w.full_circle(); w = w.circulate_face_ccw()) {
Vec3d n(normal(m, w.vertex()));
if(smooth)
glNormal3dv(n.get());
Vec3d d = lines[w.vertex()];
d = normalize(d-n*dot(n,d));
glVertexAttrib3dv(direction, d.get());
glVertex3dv(m.pos(w.vertex()).get());
}
glEnd();
}
glBindTexture(GL_TEXTURE_3D, 0);
glEndList();
glUseProgram(old_prog);
}
void ShaderProgram::setAttribute(GLint index, const Vector3d &v)
{
glVertexAttrib3dv(index, &(v.x));
}
void drawBumpTorus(double radius1, double radius2,
int nSide, int nRing, int nRepeatS, int nRepeatT)
{
//radius1:円環断面半径
//radius2:円環の中心軸半径
//nSide:円環断面における表面分割点数
//nRing:円環中心軸に沿った分割点数
int i, j;
double rr, zz;
double s0, s1, t, phi0, phi1, theta;
double p[2][3], tnt[2][3];
GLuint tangentLoc = glGetAttribLocation(shaderProg, "tangent");
for(i = 0; i < nRing; i++)
{
//i=0は基本断面(x=radius2を中心とする円, y=0）
//2つのｓ座標
s0 = (double)i / (double)nRing;
s1 = (double)(i+1) / (double)nRing;
phi0 = 2.0 * M_PI * s0;
phi1 = 2.0 * M_PI * s1;
//接線ベクトルのxyｚ成分
tnt[0][0] = - sin(phi0);
tnt[0][1] = cos(phi0);
tnt[0][2] = 0.0;
tnt[1][0] = - sin(phi1);
tnt[1][1] = cos(phi1);
tnt[1][2] = 0.0;
//s座標
s0 *= (double)nRepeatS;
s1 *= (double)nRepeatS;
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUAD_STRIP);
for(j = 0; j <= nSide; j++)
{
//t座標
t = (double)j / (double)nSide;
theta = -M_PI + 2.0 * M_PI * t;
rr = radius2 + radius1 * cos(theta);//z軸からの距離
zz = radius1 * sin(theta);
//頂点のxyz座標(j=0を内側xy平面)
p[0][0] = rr * cos(phi0);//x座標
p[0][1] = rr * sin(phi0);//y
p[0][2] = zz; //z
p[1][0] = rr * cos(phi1);//x座標
p[1][1] = rr * sin(phi1);//y
p[1][2] = zz; //z
t *= (double)nRepeatT;
glVertexAttrib3dv(tangentLoc, tnt[0]);
glTexCoord2d(s0, t);//テクスチャ座標
glNormal3d(cos(theta)*cos(phi0),cos(theta)*sin(phi0),sin(theta));
glVertex3dv(p[0]);//頂点座標
glVertexAttrib3dv(tangentLoc, tnt[1]);
glTexCoord2d(s1, t);//テクスチャ座標
glNormal3d(cos(theta)*cos(phi1),cos(theta)*sin(phi1),sin(theta));
glVertex3dv(p[1]);//頂点座標
}
glEnd();
glDisable(GL_TEXTURE_2D);
}
}