void Polygon_plot_mesh(Patch*p, color_t bg_color)
{
//glShadeModel(GL_SMOOTH);
if(bg_color.alpha != 0.0f) { // if hidden line removal
glPushAttrib(GL_CURRENT_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT );
glDisable(GL_LIGHTING);
glEnable(GL_POLYGON_OFFSET_FILL);
glPolygonOffset(1.0, 1.0);
glColorc(bg_color);
glBegin(GL_POLYGON);
for (int j=0; j<p->pointCount; j++) {
glVertex4dv(p->position[j]);
}
glEnd();
glDisable(GL_POLYGON_OFFSET_FILL);
glPopAttrib();
}
for (int j=0; j<p->pointCount; j++) {
glBegin(GL_LINES);
glVertex4dv(p->position[j]);
glVertex4dv(p->position[(j+1)%p->pointCount]);
glEnd();
}
}
/**
* Pass large doubles to OpenGL and see what
* happens when converted to float.
*/
bool
test_float_overflow(void)
{
bool pass = true;
int i;
GLdouble v[3][4];
GLdouble mat[16];
/* Make some nice vertices */
for (i = 0; i < 3; i++) {
v[i][0] = 0.0;
v[i][1] = 0.0;
v[i][2] = 0.0;
v[i][3] = 1.0;
}
/* Set problematic values */
v[0][0] = 1.0e300;
v[0][1] = -1.0e300;
v[1][0] = 1.0e-300;
v[1][1] = 1.0e-300;
/* Create a problematic matrix */
/* Identity * a scalar value of 1e100 */
for (i = 0; i < 15; i++)
mat[i] = 0.0;
mat[0] = mat[5] = mat[10] = mat[15] = 1.0e100;
/*
* Why are these functions the double version?
*
* Answer: Because the GL driver may not support double precision
* and may automatically convert the doubles to floats.
* (See glLoadMatrix in OpenGL 2.1 Reference Pages)
*/
/* Send matrix to GL */
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadMatrixd(mat);
pass &= piglit_check_gl_error(GL_NO_ERROR);
/* Send vertices to GL */
glBegin(GL_POLYGON);
glVertex4dv(v[0]);
glVertex4dv(v[1]);
glVertex4dv(v[2]);
glEnd();
pass &= piglit_check_gl_error(GL_NO_ERROR);
glPopMatrix();
return pass;
}
// I thought about making a lookup table for this, but it would involve an STL map of STL vectors
// and some weird function casts, so I'm doing it the naive way instead.
void GeomRenderer::sendVertex(GLuint vertexIndex)
{
assert(vertexData.size >= 2 && vertexData.size <= 4);
switch(vertexData.type)
{
case GL_SHORT:
if (vertexData.size == 2) glVertex2sv((const GLshort*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 3) glVertex3sv((const GLshort*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 4) glVertex4sv((const GLshort*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
break;
case GL_INT:
if (vertexData.size == 2) glVertex2iv((const GLint*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 3) glVertex3iv((const GLint*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 4) glVertex4iv((const GLint*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
break;
case GL_FLOAT:
if (vertexData.size == 2) glVertex2fv((const GLfloat*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 3) glVertex3fv((const GLfloat*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 4) glVertex4fv((const GLfloat*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
break;
case GL_DOUBLE:
if (vertexData.size == 2) glVertex2dv((const GLdouble*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 3) glVertex3dv((const GLdouble*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
if (vertexData.size == 4) glVertex4dv((const GLdouble*)((const char*)vertexData.pointer + vertexIndex*vertexData.stride));
break;
}
}
void Maze::draw(){
glBegin(GL_QUADS);
for(auto& i : quads){
glVertex4dv((double *)&i);
}
glEnd();
}
static void
DrawPoints1(void)
{
GLint i;
glColor3f(0.0, 1.0, 0.0);
glPointSize(2);
glBegin(GL_POINTS);
for (i = 0; i < VORDER; i++) {
glVertex4dv(&point1[i * 4]);
}
glEnd();
}
void __glXDisp_Vertex4dv(GLbyte *pc)
{
#ifdef __GLX_ALIGN64
if ((unsigned long)(pc) & 7) {
__GLX_MEM_COPY(pc-4, pc, 32);
pc -= 4;
}
#endif
glVertex4dv(
(GLdouble *)(pc + 0)
);
}
static void
DrawPoints2(void)
{
GLint i, j;
glColor3f(1.0, 0.0, 1.0);
glPointSize(2);
glBegin(GL_POINTS);
for (i = 0; i < VMAJOR_ORDER; i++) {
for (j = 0; j < VMINOR_ORDER; j++) {
glVertex4dv(&point2[i * 4 * VMINOR_ORDER + j * 4]);
}
}
glEnd();
}
////////////////////////////////////////////////////////////////
//
// plot the high light
//
void Highlight(int n, vector* P, vector* N, vector A, vector H, real hl_step, int highlight_type) {
real func[40];
int i;
// calculate the highlight values according to point and normal
for(i = 0; i<n; i++)
{
if(highlight_type == HIGHLIGHTLINE) {
func[i] = calc_D( P[i], N[i], A, H);
//if (calc_D( P[i], N[i], A, H, &func[i]))
if (hl_error)
return; // return if the patch is numerically unstable,
}
else {
func[i] = calc_ref_line( P[i], N[i], A, H);
//if (calc_ref_line( P[i], N[i], A, H, eye, &func[i]))
if (hl_error)
return; // return if the patch is numerically unstable,
}
}
glEnable(GL_TEXTURE_1D);
glDisable(GL_LIGHTING);
glEnable(GL_LIGHTING);
glBegin(GL_POLYGON);
for(i=0;i<n;i++) {
real f = func[i];
real color;
color = f/hl_step;
glTexCoord1d(color);
glNormal3dv(N[i]);
glVertex4dv(P[i]);
}
glEnd();
glEnable(GL_LIGHTING);
glDisable(GL_TEXTURE_1D);
}
void Polygon_plot_patch(Patch*p)
{
int j, pt;
glPushAttrib(GL_ENABLE_BIT);
glEnable(GL_LIGHTING);
glBegin(GL_POLYGON);
for (j=0; j<p->pointCount; j++) {
if(!p->normal_flipped) // reverse the orientation of the polygon
pt = (j);
else
pt = (p->pointCount-1-j);
glNormal3dv(p->normal[pt]);
double size = 64.0;
glTexCoord2d((p->position[pt])[0]/size,(p->position[pt])[2]/size);
glVertex4dv(p->position[pt]);
}
glEnd();
glPopAttrib();
}
void vertex4(const Point &p)
{
glVertex4dv(p.v);
}
template< > inline void glVertex4v< Vector3r > ( const Vector3r v ) { glVertex4dv((double*)&v); };
/////////////////////////////////////////////////////////
// Render
//
void GEMglVertex4dv :: render(GemState *state) {
glVertex4dv (v);
}
inline void glVertex4v( const GLdouble * v ) { glVertex4dv( v ); }
M(void, glVertex4dv, jobject v) {
glVertex4dv(BUFF(GLdouble, v));
}
// return 1 if this patch needs to be subdivided
// ( triangles intersect the normal to the opposite direction)
// return 0 if ok
int EncQuadBezier::make_lam()
{
VEC nor, bend, hv0, hv1; // bend = bdir
double lam, h;
int i,j, m, sm,sp,s2, idx[4][2], sd, ii,jj,
nsgn, nnsgn, cr,ncr; // booleans
VEC env[2][4]; // env[1]=(upper)=outer
int need_subdiv = 0; // return value
for (i=0; i<d1; i++)
for (j=0; j<d1; j++)
lambda[i][j][0]= lambda[i][j][1]= 0;
for (i=0; i<segu; i++) {
for (j=0; j<segv; j++) {
// normal at center determines which bilinear
// to choose, eg +++ in all components means
// ubd ubd ubd = outer
// lbd lbd lbd = inner
// determine diagonal:
// curvature - +
// + -
VEC mid[2][2];
for(m=0;m<DIM;m++) {
mid[0][0][m] =(get_enc(1,i,j)[m] + get_enc(0,i,j)[m])/2;
mid[0][1][m] =(get_enc(1,i,j+1)[m] + get_enc(0,i,j+1)[m])/2;
mid[1][0][m] =(get_enc(1,i+1,j)[m] + get_enc(0,i+1,j)[m])/2;
mid[1][1][m] =(get_enc(1,i+1,j+1)[m] + get_enc(0,i+1,j+1)[m])/2;
}
for (m=0; m<DIM; m++)
bend[m] = mid[0][0][m]+mid[1][1][m]-mid[0][1][m]-mid[1][0][m];
VVminus(mid[1][1],mid[0][0],hv0);
VVminus(mid[0][1],mid[1][0],hv1);
VVcross(hv0,hv1, nor);
// if (crease >= 0) // triangles |/| or flat
h = VVmult(sup_nor[i][j],nor);
if (h < 0) printf("h %lf\n",h);
h = VVmult(bend,nor);
cr = (h >= 0); // convex up in normal direction == cr=1
cralong[i*(segv)+j] = cr; // record crease of bilinear
// translation table
// 3 2
// 0 1
idx[0][0] = i; idx[0][1] = j;
idx[1][0] = i+1; idx[1][1] = j;
idx[2][0] = i+1; idx[2][1] = j+1;
idx[3][0] = i; idx[3][1] = j+1;
// quadrant of the normal decides on choice of bilinear
// depends on whether the normal is "outward" pointing
// bd[1]...[x]: x component larger
for (m=0; m<DIM; m++) {
nsgn = (nor[m] >= 0); // if 1 then want bd[1] -- except when
// normal is inward pointing (cube)
nnsgn = (nsgn+1)%2;
for (sd=0; sd<4; sd++) {
// (nsgn=1) want upper bd in normal dir (env[1]..)
ii = idx[sd][0]; jj = idx[sd][1];
env[1][sd][m] = get_enc(nsgn,ii,jj)[m];
env[0][sd][m] = get_enc(nnsgn,ii,jj)[m];
}
}
if(0) // draw the nor (put it in the center of the quad)
{
VEC center, sum;
for(m=0;m<DIM;m++)
{
// center of all four up-enclosure corners
center[m] = (env[1][0][m] + env[1][1][m] +
env[1][2][m] + env[1][3][m])/4;
}
Normalize(nor);
VVadd(1.0, center, 20, nor, sum);
glDisable(GL_LIGHTING);
glColor3f(0.3,0.0, 1.0);
glBegin(GL_LINES);
glVertex4dv(center);
glVertex4dv(sum);
glEnd();
glEnable(GL_LIGHTING);
}
// compute lambdas based on crease orientation
// cr==1 for ridge 02 in normal direction
// isect with 2 env[1] and 1 env[0]
for (sd=0; sd<4; sd++) { // intersect with 3 total!
ii = idx[sd][0]; jj = idx[sd][1];
sp = (sd+1)%4; s2 = (sd+2)%4; sm = (sd+3)%4;
ncr = (cr+1)%2;
// sm---s2
// | |
// sd---sp
lam = plane_intersect(sup_pt[ii][jj], sup_nor[ii][jj],
env[cr][sd], env[cr][sp], env[cr][s2]);
// Why (cr) selection? if cr then q=nor same dir as bend, as
// supnor -- so compare with the two planes of the
// triangles (cr) and then with the other (ncr)
//
if (cr) { if (lam > lambda[ii][jj][1]) lambda[ii][jj][1] = lam;
} else {
if (lam < lambda[ii][jj][0]) { lambda[ii][jj][0] = lam; }
}
if ((cr && (lam < -tol) ) || (ncr && (lam > tol)))
{
printf("not ok 1 cr %d lam %lf iijj %d %d \n",cr,lam,ii,jj);
need_subdiv = 1; // need to be subdivied
}
if(debugchoice & EXTTRI) {
set_color(ncr);
if(!ncr) // only outter enclosure
DrawTri(env[cr][sd], env[cr][sp], env[cr][s2]);
}
//else printf(" ok 1 \n");
lam = plane_intersect(sup_pt[ii][jj], sup_nor[ii][jj],
env[cr][sd], env[cr][s2], env[cr][sm]);
if (cr) { if (lam > lambda[ii][jj][1]) lambda[ii][jj][1] = lam;
} else {
if (lam < lambda[ii][jj][0]){ lambda[ii][jj][0] = lam; }
}
if ((cr && (lam < -tol) ) || (ncr && (lam > tol)))
{
printf("not ok 2 cr %d lam %lf iijj %d %d \n",cr,lam,ii,jj);
need_subdiv = 1; // need to be subdivied
}
if(debugchoice & EXTTRI) {
set_color(ncr);
if(!ncr) // only outter enclosure
DrawTri(env[cr][sd], env[cr][s2], env[cr][sm]);
}
//else printf(" ok 2 \n");
lam = plane_intersect(sup_pt[ii][jj], sup_nor[ii][jj],
env[ncr][sd], env[ncr][sp], env[ncr][sm]);
if (ncr) { if (lam > lambda[ii][jj][1]) lambda[ii][jj][1] = lam;
} else {
if (lam < lambda[ii][jj][0]) { lambda[ii][jj][0] = lam; }
}
if ((cr && (lam > tol) ) || (ncr && (lam < -tol)))
{
printf("not ok 3 cr %d lam %lf iijj %d %d \n",cr,lam,ii,jj);
need_subdiv = 1; // need to be subdivied
}
if(debugchoice & EXTTRI) {
set_color(cr);
if(!cr) // only outter enclosure
DrawTri(env[ncr][sd], env[ncr][sp], env[ncr][sm]);
}
//else printf(" ok 3 \n");
cr = ncr; // crease opposite at next point
}
// w...[1] has pos (in normal dir) values
}
}
// subdivide the patch if needed
return need_subdiv;
}