/*
* glsurfeval.c++
*
- * $Date: 2001/07/16 15:46:42 $ $Revision: 1.2 $
- * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/glsurfeval.cc,v 1.2 2001/07/16 15:46:42 brianp Exp $
*/
/* Polynomial Evaluator Interface */
/*#define NO_EVALUATION*/
//#define USE_LOD //for LOD test, have to turn on USE_LOD in insurfeval.c++ too
-
+
/*for statistics*/
//#define STATISTICS
#ifdef STATISTICS
static int STAT_num_of_triangles=0;
static int STAT_num_of_eval_vertices=0;
static int STAT_num_of_quad_strips=0;
-#endif
+#endif
/*for output triangles*/
/*#define OUTPUT_TRIANGLES*/
/*#define FOR_CHRIS*/
#ifdef FOR_CHRIS
extern "C" { void evalUStripExt(int n_upper, REAL v_upper, REAL* upper_val,
- int n_lower, REAL v_lower, REAL* lower_val);}
+ int n_lower, REAL v_lower, REAL* lower_val);}
extern "C" { void evalVStripExt(int n_left, REAL u_left, REAL* left_val,
- int n_right, REAL u_right, REAL* right_val);
+ int n_right, REAL u_right, REAL* right_val);
}
#endif
/**************begin for LOD_eval_list***********/
-void OpenGLSurfaceEvaluator::LOD_eval_list(int level)
+void OpenGLSurfaceEvaluator::LOD_eval_list(int level)
{
if(level == 0)
LOD_eval_level = 1;
}
-OpenGLSurfaceEvaluator::OpenGLSurfaceEvaluator()
-{
+OpenGLSurfaceEvaluator::OpenGLSurfaceEvaluator()
+{
int i;
for (i=0; i<VERTEX_CACHE_SIZE; i++) {
global_uorder_BV = 0;
global_vorder_BV = 0;
global_baseData = NULL;
-
+
global_bpm = NULL;
output_triangles = 0; //don't output triangles by default
#endif
}
-OpenGLSurfaceEvaluator::~OpenGLSurfaceEvaluator()
-{
+OpenGLSurfaceEvaluator::~OpenGLSurfaceEvaluator()
+{
for (int ii= 0; ii< VERTEX_CACHE_SIZE; ii++) {
delete vertexCache[ii];
vertexCache[ii]= 0;
OpenGLSurfaceEvaluator::mapgrid2f(long nu, REAL u0, REAL u1, long nv, REAL v0, REAL v1)
{
#ifdef USE_INTERNAL_EVAL
- inMapGrid2f((int) nu, (REAL) u0, (REAL) u1, (int) nv,
+ inMapGrid2f((int) nu, (REAL) u0, (REAL) u1, (int) nv,
(REAL) v0, (REAL) v1);
#else
- if(output_triangles)
+ if(output_triangles)
{
global_grid_u0 = u0;
global_grid_u1 = u1;
global_grid_nv = nv;
}
else
- glMapGrid2d((GLint) nu, (GLdouble) u0, (GLdouble) u1, (GLint) nv,
+ glMapGrid2d((GLint) nu, (GLdouble) u0, (GLdouble) u1, (GLint) nv,
(GLdouble) v0, (GLdouble) v1);
#endif
switch(style) {
default:
case N_MESHFILL:
-
+
glPolygonMode((GLenum) GL_FRONT_AND_BACK, (GLenum) GL_FILL);
break;
case N_MESHLINE:
/*
*the algorithm works by scanning from left to right.
*leftMostV: the left most of the remaining verteces (on both upper and lower).
- * it could an element of upperVerts or lowerVerts.
- *i: upperVerts[i] is the first vertex to the right of leftMostV on upper line
- *j: lowerVerts[j] is the first vertex to the right of leftMostV on lower line
+ * it could an element of upperVerts or lowerVerts.
+ *i: upperVerts[i] is the first vertex to the right of leftMostV on upper line
+ *j: lowerVerts[j] is the first vertex to the right of leftMostV on lower line
*/
-
+
/*initialize i,j,and leftMostV
*/
if(upper_val[0] <= lower_val[0])
leftMostV[1] = v_lower;
}
-
+
/*the main loop.
- *the invariance is that:
- *at the beginning of each loop, the meaning of i,j,and leftMostV are
+ *the invariance is that:
+ *at the beginning of each loop, the meaning of i,j,and leftMostV are
*maintained
*/
while(1)
{
if(i >= n_upper) /*case1: no more in upper*/
- {
- if(j<n_lower-1) /*at least two vertices in lower*/
- {
- bgntfan();
+ {
+ if(j<n_lower-1) /*at least two vertices in lower*/
+ {
+ bgntfan();
coord2f(leftMostV[0], leftMostV[1]);
// glNormal3fv(leftMostNormal);
-// glVertex3fv(leftMostXYZ);
+// glVertex3fv(leftMostXYZ);
- while(j<n_lower){
+ while(j<n_lower){
coord2f(lower_val[j], v_lower);
// glNormal3fv(lowerNormal[j]);
// glVertex3fv(lowerXYZ[j]);
j++;
- }
- endtfan();
- }
- break; /*exit the main loop*/
- }
+ }
+ endtfan();
+ }
+ break; /*exit the main loop*/
+ }
else if(j>= n_lower) /*case2: no more in lower*/
- {
- if(i<n_upper-1) /*at least two vertices in upper*/
- {
- bgntfan();
+ {
+ if(i<n_upper-1) /*at least two vertices in upper*/
+ {
+ bgntfan();
coord2f(leftMostV[0], leftMostV[1]);
// glNormal3fv(leftMostNormal);
// glVertex3fv(leftMostXYZ);
-
- for(k=n_upper-1; k>=i; k--) /*reverse order for two-side lighting*/
+
+ for(k=n_upper-1; k>=i; k--) /*reverse order for two-side lighting*/
{
coord2f(upper_val[k], v_upper);
// glNormal3fv(upperNormal[k]);
// glVertex3fv(upperXYZ[k]);
}
- endtfan();
- }
- break; /*exit the main loop*/
- }
+ endtfan();
+ }
+ break; /*exit the main loop*/
+ }
else /* case3: neither is empty, plus the leftMostV, there is at least one triangle to output*/
- {
- if(upper_val[i] <= lower_val[j])
- {
+ {
+ if(upper_val[i] <= lower_val[j])
+ {
bgntfan();
coord2f(lower_val[j], v_lower);
// glNormal3fv(lowerNormal[j]);
// glVertex3fv(lowerXYZ[j]);
- /*find the last k>=i such that
- *upperverts[k][0] <= lowerverts[j][0]
- */
- k=i;
+ /*find the last k>=i such that
+ *upperverts[k][0] <= lowerverts[j][0]
+ */
+ k=i;
- while(k<n_upper)
- {
- if(upper_val[k] > lower_val[j])
- break;
- k++;
+ while(k<n_upper)
+ {
+ if(upper_val[k] > lower_val[j])
+ break;
+ k++;
- }
- k--;
+ }
+ k--;
- for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
- {
+ for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
+ {
coord2f(upper_val[l], v_upper);
// glNormal3fv(upperNormal[l]);
// glVertex3fv(upperXYZ[l]);
- }
+ }
coord2f(leftMostV[0], leftMostV[1]);
// glNormal3fv(leftMostNormal);
// glVertex3fv(leftMostXYZ);
- endtfan();
+ endtfan();
- /*update i and leftMostV for next loop
- */
- i = k+1;
+ /*update i and leftMostV for next loop
+ */
+ i = k+1;
leftMostV[0] = upper_val[k];
leftMostV[1] = v_upper;
// leftMostNormal = upperNormal[k];
// leftMostXYZ = upperXYZ[k];
- }
- else /*upperVerts[i][0] > lowerVerts[j][0]*/
- {
+ }
+ else /*upperVerts[i][0] > lowerVerts[j][0]*/
+ {
bgntfan();
coord2f(upper_val[i], v_upper);
// glNormal3fv(upperNormal[i]);
// glVertex3fv(upperXYZ[i]);
-
+
coord2f(leftMostV[0], leftMostV[1]);
-// glNormal3fv(leftMostNormal);
+// glNormal3fv(leftMostNormal);
// glVertex3fv(leftMostXYZ);
-
-
- /*find the last k>=j such that
- *lowerverts[k][0] < upperverts[i][0]
- */
- k=j;
- while(k< n_lower)
- {
- if(lower_val[k] >= upper_val[i])
- break;
+
+
+ /*find the last k>=j such that
+ *lowerverts[k][0] < upperverts[i][0]
+ */
+ k=j;
+ while(k< n_lower)
+ {
+ if(lower_val[k] >= upper_val[i])
+ break;
coord2f(lower_val[k], v_lower);
// glNormal3fv(lowerNormal[k]);
// glVertex3fv(lowerXYZ[k]);
- k++;
- }
- endtfan();
+ k++;
+ }
+ endtfan();
- /*update j and leftMostV for next loop
- */
- j=k;
+ /*update j and leftMostV for next loop
+ */
+ j=k;
leftMostV[0] = lower_val[j-1];
leftMostV[1] = v_lower;
// leftMostNormal = lowerNormal[j-1];
// leftMostXYZ = lowerXYZ[j-1];
- }
- }
+ }
+ }
}
- //clean up
+ //clean up
// free(upperXYZ);
// free(lowerXYZ);
// free(upperNormal);
#endif
}
-
+
void
OpenGLSurfaceEvaluator::evalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val)
/*
*the algorithm works by scanning from bot to top.
*botMostV: the bot most of the remaining verteces (on both left and right).
- * it could an element of leftVerts or rightVerts.
- *i: leftVerts[i] is the first vertex to the top of botMostV on left line
+ * it could an element of leftVerts or rightVerts.
+ *i: leftVerts[i] is the first vertex to the top of botMostV on left line
*j: rightVerts[j] is the first vertex to the top of botMostV on rightline
*/
-
+
/*initialize i,j,and botMostV
*/
if(left_val[0] <= right_val[0])
}
/*the main loop.
- *the invariance is that:
- *at the beginning of each loop, the meaning of i,j,and botMostV are
+ *the invariance is that:
+ *at the beginning of each loop, the meaning of i,j,and botMostV are
*maintained
*/
while(1)
{
if(i >= n_left) /*case1: no more in left*/
- {
- if(j<n_right-1) /*at least two vertices in right*/
- {
- bgntfan();
+ {
+ if(j<n_right-1) /*at least two vertices in right*/
+ {
+ bgntfan();
coord2f(botMostV[0], botMostV[1]);
- while(j<n_right){
+ while(j<n_right){
coord2f(u_right, right_val[j]);
// glNormal3fv(rightNormal[j]);
// glVertex3fv(rightXYZ[j]);
j++;
- }
- endtfan();
- }
- break; /*exit the main loop*/
- }
+ }
+ endtfan();
+ }
+ break; /*exit the main loop*/
+ }
else if(j>= n_right) /*case2: no more in right*/
- {
- if(i<n_left-1) /*at least two vertices in left*/
- {
- bgntfan();
- coord2f(botMostV[0], botMostV[1]);
+ {
+ if(i<n_left-1) /*at least two vertices in left*/
+ {
+ bgntfan();
+ coord2f(botMostV[0], botMostV[1]);
// glNormal3fv(botMostNormal);
// glVertex3fv(botMostXYZ);
-
- for(k=n_left-1; k>=i; k--) /*reverse order for two-side lighting*/
+
+ for(k=n_left-1; k>=i; k--) /*reverse order for two-side lighting*/
{
coord2f(u_left, left_val[k]);
// glNormal3fv(leftNormal[k]);
// glVertex3fv(leftXYZ[k]);
}
- endtfan();
- }
- break; /*exit the main loop*/
- }
+ endtfan();
+ }
+ break; /*exit the main loop*/
+ }
else /* case3: neither is empty, plus the botMostV, there is at least one triangle to output*/
- {
- if(left_val[i] <= right_val[j])
- {
+ {
+ if(left_val[i] <= right_val[j])
+ {
bgntfan();
coord2f(u_right, right_val[j]);
// glNormal3fv(rightNormal[j]);
// glVertex3fv(rightXYZ[j]);
- /*find the last k>=i such that
- *leftverts[k][0] <= rightverts[j][0]
- */
- k=i;
+ /*find the last k>=i such that
+ *leftverts[k][0] <= rightverts[j][0]
+ */
+ k=i;
- while(k<n_left)
- {
- if(left_val[k] > right_val[j])
- break;
- k++;
+ while(k<n_left)
+ {
+ if(left_val[k] > right_val[j])
+ break;
+ k++;
- }
- k--;
+ }
+ k--;
- for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
- {
+ for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
+ {
coord2f(u_left, left_val[l]);
// glNormal3fv(leftNormal[l]);
// glVertex3fv(leftXYZ[l]);
- }
+ }
coord2f(botMostV[0], botMostV[1]);
// glNormal3fv(botMostNormal);
// glVertex3fv(botMostXYZ);
- endtfan();
+ endtfan();
- /*update i and botMostV for next loop
- */
- i = k+1;
+ /*update i and botMostV for next loop
+ */
+ i = k+1;
botMostV[0] = u_left;
botMostV[1] = left_val[k];
// botMostNormal = leftNormal[k];
// botMostXYZ = leftXYZ[k];
- }
- else /*left_val[i] > right_val[j])*/
- {
+ }
+ else /*left_val[i] > right_val[j])*/
+ {
bgntfan();
coord2f(u_left, left_val[i]);
// glNormal3fv(leftNormal[i]);
// glVertex3fv(leftXYZ[i]);
-
+
coord2f(botMostV[0], botMostV[1]);
-// glNormal3fv(botMostNormal);
+// glNormal3fv(botMostNormal);
// glVertex3fv(botMostXYZ);
-
-
- /*find the last k>=j such that
- *rightverts[k][0] < leftverts[i][0]
- */
- k=j;
- while(k< n_right)
- {
- if(right_val[k] >= left_val[i])
- break;
+
+
+ /*find the last k>=j such that
+ *rightverts[k][0] < leftverts[i][0]
+ */
+ k=j;
+ while(k< n_right)
+ {
+ if(right_val[k] >= left_val[i])
+ break;
coord2f(u_right, right_val[k]);
// glNormal3fv(rightNormal[k]);
// glVertex3fv(rightXYZ[k]);
- k++;
- }
- endtfan();
+ k++;
+ }
+ endtfan();
- /*update j and botMostV for next loop
- */
- j=k;
+ /*update j and botMostV for next loop
+ */
+ j=k;
botMostV[0] = u_right;
botMostV[1] = right_val[j-1];
// botMostNormal = rightNormal[j-1];
// botMostXYZ = rightXYZ[j-1];
- }
- }
+ }
+ }
}
- //clean up
+ //clean up
// free(leftXYZ);
// free(leftNormal);
// free(rightXYZ);
// free(rightNormal);
#endif
}
-
+
void
OpenGLSurfaceEvaluator::bgnqstrip(void)
{
if(output_triangles)
{
- /*deallocate the space which may has been
+ /*deallocate the space which may has been
*allocated by global_bpm previously
*/
if(global_bpm != NULL) {
bezierPatchMeshListDelete(global_bpm);
global_bpm = NULL;
}
-
+
/*
auto_normal_flag = 1; //always output normal in callback mode.
- //we could have used the following code,
- //but Inspector doesn't have gl context
- //before it calls tessellator.
- //this way is temporary.
+ //we could have used the following code,
+ //but Inspector doesn't have gl context
+ //before it calls tessellator.
+ //this way is temporary.
*/
//NEWCALLBACK
//if one of the two normal callback functions are set,
- //then set
+ //then set
if(normalCallBackN != NULL ||
normalCallBackData != NULL)
auto_normal_flag = 1;
if(glIsEnabled(GL_AUTO_NORMAL) == GL_TRUE)
auto_normal_flag = 1;
else if (callback_auto_normal == 1)
- auto_normal_flag = 1;
+ auto_normal_flag = 1;
else
auto_normal_flag = 0;
*/
+ glPushAttrib((GLbitfield) GL_EVAL_BIT);
- //NEWCALLBACK: no need to worry about gl states when gling clalback
}
- else
+ else
{
glPushAttrib((GLbitfield) GL_EVAL_BIT);
-
+
/*to avoid side effect, we restor the opengl state for GL_POLYGON_MODE
- */
+ */
glGetIntegerv(GL_POLYGON_MODE, gl_polygon_mode);
}
if(output_triangles)
{
//bezierPatchMeshListDelDeg(global_bpm);
-
+
// bezierPatchMeshListEval(global_bpm);
//surfcount++;
//printf("surfcount=%i\n", surfcount);
//if(surfcount == 8) exit(0);
-
+
inBPMListEvalEM(global_bpm);
-
-
-
+
+
+
/*
global_bpm = bezierPatchMeshListReverse(global_bpm);
{
//bezierPatchMeshListPrint(global_bpm);
//bezierPatchMeshListDraw(global_bpm);
-// printf("num triangles=%i\n", bezierPatchMeshListNumTriangles(global_bpm));
+// printf("num triangles=%i\n", bezierPatchMeshListNumTriangles(global_bpm));
#ifdef USE_LOD
#else
bezierPatchMeshListDelete(global_bpm);
global_bpm = NULL;
#endif
-
+ glPopAttrib();
}
else
{
#ifndef USE_LOD
-glPopAttrib();
+ glPopAttrib();
#endif
#ifdef STATISTICS
void
OpenGLSurfaceEvaluator::map2f(
long _type,
- REAL _ulower, /* u lower domain coord */
+ REAL _ulower, /* u lower domain coord */
REAL _uupper, /* u upper domain coord */
long _ustride, /* interpoint distance */
long _uorder, /* parametric order */
- REAL _vlower, /* v lower domain coord */
- REAL _vupper, /* v upper domain coord */
+ REAL _vlower, /* v lower domain coord */
+ REAL _vupper, /* v upper domain coord */
long _vstride, /* interpoint distance */
long _vorder, /* parametric order */
- REAL *pts) /* control points */
+ REAL *pts) /* control points */
{
#ifdef USE_INTERNAL_EVAL
- inMap2f((int) _type, (REAL) _ulower, (REAL) _uupper,
- (int) _ustride, (int) _uorder, (REAL) _vlower,
- (REAL) _vupper, (int) _vstride, (int) _vorder,
+ inMap2f((int) _type, (REAL) _ulower, (REAL) _uupper,
+ (int) _ustride, (int) _uorder, (REAL) _vlower,
+ (REAL) _vupper, (int) _vstride, (int) _vorder,
(REAL *) pts);
#else
if(global_bpm == NULL)
global_bpm = bezierPatchMeshMake2(10,10);
if(
- (global_bpm->bpatch == NULL &&
+ (global_bpm->bpatch == NULL &&
(_type == GL_MAP2_VERTEX_3 || _type == GL_MAP2_VERTEX_4))
||
(global_bpm->bpatch_normal == NULL &&
global_bpm = bezierPatchMeshListInsert(global_bpm, temp);
/*
- global_bpm = bezierPatchMeshListInsert(global_bpm,
+ global_bpm = bezierPatchMeshListInsert(global_bpm,
bezierPatchMeshMake(
(int) _type, _ulower, _uupper,(int) _ustride, (int) _uorder, _vlower, _vupper, (int) _vstride, (int) _vorder, pts, 10, 10));
*/
}
else /*not output triangles*/
{
- glMap2f((GLenum) _type, (GLfloat) _ulower, (GLfloat) _uupper,
- (GLint) _ustride, (GLint) _uorder, (GLfloat) _vlower,
- (GLfloat) _vupper, (GLint) _vstride, (GLint) _vorder,
+ glMap2f((GLenum) _type, (GLfloat) _ulower, (GLfloat) _uupper,
+ (GLint) _ustride, (GLint) _uorder, (GLfloat) _vlower,
+ (GLfloat) _vupper, (GLint) _vstride, (GLint) _vorder,
(const GLfloat *) pts);
}
-
+
#endif
}
REAL du, dv;
long i,j;
- long row;
if(global_grid_nu == 0 || global_grid_nv == 0)
return; /*no points need to be output*/
du = (global_grid_u1 - global_grid_u0) / (REAL)global_grid_nu;
- dv = (global_grid_v1 - global_grid_v0) / (REAL)global_grid_nv;
-
+ dv = (global_grid_v1 - global_grid_v0) / (REAL)global_grid_nv;
+
if(global_grid_nu >= global_grid_nv){
for(i=umin; i<umax; i++){
REAL u1 = (i==global_grid_nu)? global_grid_u1:(global_grid_u0 + i*du);
REAL u2 = ((i+1) == global_grid_nu)? global_grid_u1: (global_grid_u0+(i+1)*du);
-
+
bgnqstrip();
for(j=vmax; j>=vmin; j--){
REAL v1 = (j == global_grid_nv)? global_grid_v1: (global_grid_v0 +j*dv);
-
+
coord2f(u1, v1);
coord2f(u2, v1);
}
for(i=vmin; i<vmax; i++){
REAL v1 = (i==global_grid_nv)? global_grid_v1:(global_grid_v0 + i*dv);
REAL v2 = ((i+1) == global_grid_nv)? global_grid_v1: (global_grid_v0+(i+1)*dv);
-
+
bgnqstrip();
for(j=umax; j>=umin; j--){
- REAL u1 = (j == global_grid_nu)? global_grid_u1: (global_grid_u0 +j*du);
+ REAL u1 = (j == global_grid_nu)? global_grid_u1: (global_grid_u0 +j*du);
coord2f(u1, v2);
coord2f(u1, v1);
}
switch(style) {
default:
case N_MESHFILL:
- glEvalMesh2((GLenum) GL_FILL, (GLint) umin, (GLint) umax,
+ glEvalMesh2((GLenum) GL_FILL, (GLint) umin, (GLint) umax,
(GLint) vmin, (GLint) vmax);
break;
case N_MESHLINE:
- glEvalMesh2((GLenum) GL_LINE, (GLint) umin, (GLint) umax,
+ glEvalMesh2((GLenum) GL_LINE, (GLint) umin, (GLint) umax,
(GLint) vmin, (GLint) vmax);
break;
case N_MESHPOINT:
- glEvalMesh2((GLenum) GL_POINT, (GLint) umin, (GLint) umax,
+ glEvalMesh2((GLenum) GL_POINT, (GLint) umin, (GLint) umax,
(GLint) vmin, (GLint) vmax);
break;
}
if (vcount == 2) {
vertexCache[0]->invoke(this);
vertexCache[1]->invoke(this);
- coord2f(u,v);
+ coord2f(u,v);
} else {
vcount++;
}
-void
-OpenGLSurfaceEvaluator::putCallBack(GLenum which, _GLUfuncptr fn )
+#ifdef _WIN32
+void OpenGLSurfaceEvaluator::putCallBack(GLenum which, void (GLAPIENTRY *fn)() )
+#else
+void OpenGLSurfaceEvaluator::putCallBack(GLenum which, _GLUfuncptr fn )
+#endif
{
switch(which)
{
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