/* nurb:BeginCurve() -> nurb */
static int luaglu_begin_curve(lua_State *L)
{
LuaGLUnurb *lnurb=luaglu_checknurb(L,1);
gluBeginCurve(lnurb->nurb);
lua_pushvalue(L,1);
return 1;
}
void ReDraw(void)
{
glColor3ub(0,0,220);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glRotatef(330.0f, 1.0f,0.0f,0.0f);
// 定义NURBS曲线
gluBeginCurve(pNurb);
gluNurbsCurve(pNurb, // 定义NURBS对象
8, // knot中的结点数目
Knots, // knots数组
3, // 相邻两个曲线控制点之间的偏移量
&ctrlPoints[0][0], // 指向控制点数组的指针
4, // 曲线的阶数
GL_MAP1_VERTEX_3); // 曲线的类型
gluEndCurve(pNurb);
DrawPoints();
glPopMatrix();
glutSwapBuffers();
}
void display(void)
{
char buffer[256];
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* keep in mind that `D` and `E` are simply pointers to the
corresponding control points of `spline`. */
for (i = 0; i < 3; i++) {
D[i] = A[i] + t*v[i];
E[i] = C[i] + t*w[i];
}
ts_bspline_set_control_points(&spline, ctrlp, NULL);
/* draw spline */
glColor3f(1.0, 1.0, 1.0);
glLineWidth(3);
gluBeginCurve(theNurb);
gluNurbsCurve(
theNurb,
(GLint)ts_bspline_num_knots(&spline),
knots,
(GLint)ts_bspline_dimension(&spline),
ctrlp,
(GLint)ts_bspline_order(&spline),
GL_MAP1_VERTEX_3
);
gluEndCurve(theNurb);
/* draw control points */
glColor3f(1.0, 0.0, 0.0);
glPointSize(5.0);
glBegin(GL_POINTS);
for (i = 0; i < ts_bspline_num_control_points(&spline); i++)
glVertex3fv(&ctrlp[i * ts_bspline_dimension(&spline)]);
glEnd();
/* draw B */
glColor3f(0.0, 0.0, 1.0);
glBegin(GL_POINTS);
glVertex3fv(B);
glEnd();
/* display t */
sprintf(buffer, "t: %.2f", t);
displayText(-.2f, 1.2f, 0.0, 1.0, 0.0, buffer);
glutSwapBuffers();
glutPostRedisplay();
t += 0.001f;
if (t > 1.f) {
t = 0.f;
}
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// draw spline
glColor3f(1.0, 1.0, 1.0);
glLineWidth(3);
gluBeginCurve(theNurb);
gluNurbsCurve(
theNurb,
spline.n_knots,
spline.knots,
spline.dim,
spline.ctrlp,
spline.order,
GL_MAP1_VERTEX_3
);
gluEndCurve(theNurb);
// draw control points
glColor3f(1.0, 0.0, 0.0);
glPointSize(5.0);
float j=0;
size_t i;
glBegin(GL_POINTS);
for (i = 0; i < spline.n_ctrlp; i++) {
j+=1.0/n_ctrlp;
glColor3f(0.0, j, 0.0);
glVertex3fv(&spline.ctrlp[i * spline.dim]);
}
glEnd();
// draw evaluation
glColor3f(0.0, 0.0, 1.0);
glPointSize(5.0);
tsDeBoorNet net;
ts_bspline_evaluate(&spline, u, &net);
glBegin(GL_POINTS);
glVertex3fv(net.result);
glEnd();
ts_deboornet_free(&net);
u += 0.001;
if (u > 4.f) {
u = 0.f;
}
glutSwapBuffers();
glutPostRedisplay();
}
void display(void)
{
size_t i;
tsBSpline buckled;
tsReal *ctrlp, *knots;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
ts_bspline_buckle(&spline, b, &buckled, NULL);
/* draw buckled */
ts_bspline_control_points(&buckled, &ctrlp, NULL);
ts_bspline_knots(&buckled, &knots, NULL);
glColor3f(1.0, 1.0, 1.0);
glLineWidth(3);
gluBeginCurve(theNurb);
gluNurbsCurve(
theNurb,
(GLint)ts_bspline_num_knots(&buckled),
knots,
(GLint)ts_bspline_dimension(&buckled),
ctrlp,
(GLint)ts_bspline_order(&buckled),
GL_MAP1_VERTEX_3
);
gluEndCurve(theNurb);
/* draw control points */
glColor3f(1.0, 0.0, 0.0);
glPointSize(5.0);
glBegin(GL_POINTS);
for (i = 0; i < ts_bspline_num_control_points(&buckled); i++)
glVertex3fv(&ctrlp[i * ts_bspline_dimension(&buckled)]);
glEnd();
ts_bspline_free(&buckled);
free(ctrlp);
free(knots);
b -= 0.001f;
if (b < 0.f)
b = 1.f;
glutSwapBuffers();
glutPostRedisplay();
}
void display(void)
{
int i;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* glLoadIdentity(); */
glColor3f(0.,0.,0.);
glPushMatrix();
glScalef(1.3, 1.3, 1.);
gluBeginCurve(pNurb2);
gluNurbsCurve(pNurb2, nKnots2, Knots2, kStride,
&pointsWeights2[flyingboom][0][0],
order2, GL_MAP1_VERTEX_4);
gluEndCurve(pNurb2);
// Draw the control points
glPointSize(3.0f);
glColor3f(1.,0.,0.);
glBegin(GL_POINTS);
for(i = 0; i < NPOINTS2; i++)
glVertex3fv(pointsWeights2[flyingboom][i]);
glEnd();
glPointSize(5.0f);
glColor3f(0.,0.,1.);
glBegin(GL_POINTS);
for(i = 1; i < NPOINTS2; i += 2)
glVertex3fv(pointsWeights2[flyingboom][i]);
glEnd();
glColor3f(0., 1., 0.);
glBegin(GL_POINTS);
glVertex3fv(pointsWeights2[flyingboom][0]);
if (flyingboom == NUMBOOMS - 1) glVertex3f(0., 0., 0.);
glEnd();
glPopMatrix();
glFlush();
}
void render_scene()
{
int count=0;
int u=0;
glClear(GL_COLOR_BUFFER_BIT);
/* Curve color */
glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
/* tells GLU we are going to describe a nurbs curve */
gluBeginCurve(mynurbs);
/* send it the definition and pointers to cv and knot data */
gluNurbsCurve(mynurbs, numknots, knots, stride, cvs, order, GLU_MAP1_VERTEX_3);
/* thats all... */
gluEndCurve(mynurbs);
/* Control points color */
glColor4f(0.0f, 0.0f, 1.0f, 1.0f);
/* Enable vertex array */
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, cvs);
/* render the control vertex positions */
glDrawArrays(GL_POINTS, 0, cvcount);
glDisableClientState(GL_VERTEX_ARRAY);
/* Flush all drawings */
glFlush();
/* Update knots */
for (u=0; u<cvcount; u++)
{
cvs[count++]=0;
cvs[count++]=cos(5.2f*sqrt(u*u)+frame*0.01f)*0.5f;
cvs[count++]=sin(10.0f*sqrt(u*u)+frame*0.013f)*0.5f;
}
frame++;
}
// Called to draw scene
void RenderScene(void)
{
// Draw in Blue
glColor3ub(0,0,220);
// Clear the window with current clearing color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Save the modelview matrix stack
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
// Rotate the mesh around to make it easier to see
glRotatef(330.0f, 1.0f,0.0f,0.0f);
// Render the NURB
// Begin the NURB definition
gluBeginCurve(pNurb);
// Evaluate the surface
gluNurbsCurve(pNurb,
8, Knots,
3,
&ctrlPoints[0][0],
4,
GL_MAP1_VERTEX_3);
// Done with surface
gluEndCurve(pNurb);
// Show the control points
DrawPoints();
// Restore the modelview matrix
glPopMatrix();
// Dispalay the image
glutSwapBuffers();
}
void display(void){
int i;
glClear(GL_COLOR_BUFFER_BIT);
switch(spline){
case BEZIER:
glMap1f(GL_MAP1_VERTEX_3, 0.0, 1.0, 3, nVertices, &vertices[0][0]);
glBegin(GL_LINE_STRIP);
for (i = 0; i <= 30; i++){
glEvalCoord1f((GLfloat) i/30.0);
}
glEnd();
break;
case NURBS:
gluBeginCurve(nc);
gluNurbsCurve(nc, nNos, nos, 3, &vertices[0][0], 4, GL_MAP1_VERTEX_3);
gluEndCurve(nc);
break;
}
glPointSize(5.0);
glColor3f(1.0, 1.0, 0.0);
glBegin(GL_LINE_STRIP);
for (i = 0; i < nVertices; i++)
glVertex3fv(&vertices[i][0]);
glEnd();
glColor3f(1.0, 0.0, 0.0);
glBegin(GL_POINTS);
for (i = 0; i < nVertices; i++)
glVertex3fv(&vertices[i][0]);
glEnd();
glColor3f(1.0, 1.0, 1.0);
glFlush();
glutSwapBuffers();
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
tsBSpline draw;
if (drawBeziers)
ts_bspline_to_beziers(&spline, &draw);
else
ts_bspline_copy(&spline, &draw);
glColor3f(1.0, 1.0, 1.0);
glLineWidth(3);
gluBeginCurve(theNurb);
gluNurbsCurve(
theNurb,
draw.n_knots,
draw.knots,
draw.dim,
draw.ctrlp,
draw.order,
GL_MAP1_VERTEX_3
);
gluEndCurve(theNurb);
ts_bspline_free(&draw);
// draw control points
glColor3f(1.0, 0.0, 0.0);
glPointSize(5.0);
size_t i;
glBegin(GL_POINTS);
for (i = 0; i < spline.n_ctrlp; i++)
glVertex3fv(&spline.ctrlp[i * spline.dim]);
glEnd();
glutSwapBuffers();
glutPostRedisplay();
}
static int tolua_glu_gluBeginCurve00(lua_State* tolua_S)
{
#ifndef TOLUA_RELEASE
tolua_Error tolua_err;
if (
!tolua_isusertype(tolua_S,1,"GLUnurbsObj",0,&tolua_err) ||
!tolua_isnoobj(tolua_S,2,&tolua_err)
)
goto tolua_lerror;
else
#endif
{
GLUnurbsObj* nobj = ((GLUnurbsObj*) tolua_tousertype(tolua_S,1,0));
{
gluBeginCurve(nobj);
}
}
return 0;
#ifndef TOLUA_RELEASE
tolua_lerror:
tolua_error(tolua_S,"#ferror in function 'gluBeginCurve'.",&tolua_err);
return 0;
#endif
}
void ON_GL( int dim, int is_rat, int nurb_order, int cv_count,
const double* knot_vector,
int cv_stride, const double* cv,
GLUnurbsObj* nobj,
GLenum type,
int bPermitKnotScaling,
double* knot_scale,
double xform[][4]
)
{
ON_BOOL32 bCallgluBeginEndCurve = false;
int i;
GLint nknots = nurb_order + cv_count; // GL knot count = TL knot count + 2
GLfloat* knot = (GLfloat*)onmalloc( nknots*sizeof(*knot) );
ON_GL( nurb_order, cv_count, knot_vector, knot, bPermitKnotScaling, knot_scale );
// control vertices
//const int cv_size = (is_rat) ? dim+1: dim;
GLint stride = cv_stride;
GLfloat* ctlarray = (GLfloat*)onmalloc( stride*cv_count*sizeof(*ctlarray) );
for ( i = 0; i < cv_count; i++ ) {
GetGLCV( dim, is_rat, cv + i*cv_stride, xform, ctlarray + stride*i );
}
GLint order = nurb_order;
switch(type)
{
case 0:
{
switch ( dim ) {
case 2: // must be a GLU_MAP1_TRIM_2/3
type = ( is_rat )
? GLU_MAP1_TRIM_3 // rational 2d trim uses homogeneous coords
: GLU_MAP1_TRIM_2; // non-rational 2d trim uses euclidean coords
break;
case 3: // must be a GLU_MAP1_VERTEX_3/4
type = ( is_rat )
? GL_MAP1_VERTEX_4 // rational 3d curve uses homogeneous coords
: GL_MAP1_VERTEX_3; // non-rational 3d curve used euclidean coords
bCallgluBeginEndCurve = true;
break;
}
}
break;
case GLU_MAP1_TRIM_2:
case GLU_MAP1_TRIM_3:
// make sure type matches rational flag
type = ( is_rat )
? GLU_MAP1_TRIM_3 // rational 2d trim uses homogeneous coords
: GLU_MAP1_TRIM_2; // non-rational 2d trim uses euclidean coords
break;
case GL_MAP1_VERTEX_3:
case GL_MAP1_VERTEX_4:
// make sure type matches rational flag
type = ( is_rat )
? GL_MAP1_VERTEX_4 // rational 3d curve uses homogeneous coords
: GL_MAP1_VERTEX_3; // non-rational 3d curve used euclidean coords
bCallgluBeginEndCurve = true;
break;
}
if ( bCallgluBeginEndCurve )
gluBeginCurve(nobj);
gluNurbsCurve(
nobj,
nknots,
knot,
stride,
ctlarray,
order,
type
);
if ( bCallgluBeginEndCurve )
gluEndCurve(nobj);
onfree( ctlarray );
onfree( knot );
}
/***************************************************************************
DrawTrace
****************************************************************************/
static void DrawTrace(int snum){
int i = 0;
float comx = 0.0,
comy = 0.0,
comz = 0.0;
struct coord *c = state->coords[snum];
for (i=0; i<c->size; i++){
comx += c->rp_ca[i].x;
comy += c->rp_ca[i].y;
comz += c->rp_ca[i].z;
}
comx /= c->size;
comy /= c->size;
comz /= c->size;
GLUnurbsObj *nurbs = gluNewNurbsRenderer();
GLfloat* ctrlpts = E_MALLOC(12*sizeof(GLfloat)*c->size);
for(i=0; i < c->size*12; i+=12){
ctrlpts[i] = c->rp_n[i/12].x - comx;
ctrlpts[i+1] = c->rp_n[i/12].y - comy;
ctrlpts[i+2] = c->rp_n[i/12].z - comz;
ctrlpts[i+3] = 1.0;
ctrlpts[i+4] = c->rp_ca[i/12].x - comx;
ctrlpts[i+5] = c->rp_ca[i/12].y - comy;
ctrlpts[i+6] = c->rp_ca[i/12].z - comz;
ctrlpts[i+7] = 1.0;
ctrlpts[i+8] = c->rp_c[i/12].x - comx;
ctrlpts[i+9] = c->rp_c[i/12].y - comy;
ctrlpts[i+10] = c->rp_c[i/12].z - comz;
ctrlpts[i+11] = 1.0;
}
GLfloat* knots = E_MALLOC(sizeof(GLfloat)*(c->size*3+4));
for(i=0; i < c->size*3+4; i++){
if(i>c->size*3+2){
knots[i]=knots[c->size*3+2];
}
else{
knots[i]=i/1.0-i%1;
}
}
glColor3f(0.0, 0.0, 1.0);
if(snum%3 == 1){
glColor3f(1.0, 0.0, 0.0);
}
else if(snum%3 == 2){
glColor3f(0.0, 1.0, 0.0);
}
else{
glColor3f(0.0, 1.0, 0.0);
}
glLineWidth(2);
glPushMatrix();
gluNurbsCallback(nurbs, GLU_ERROR, (GLvoid(*)())nurbsError);
gluBeginCurve(nurbs);
gluNurbsCurve(nurbs, //context object
c->size*3+4, //number of knots
knots, //knot pointer
4, //width of control points
ctrlpts, //control point pointer
4, //order of the curve (degree+1)
GL_MAP1_VERTEX_4 //type
);
gluEndCurve(nurbs);
glPopMatrix();
}
void drawBranchObject(node a, BranchAttributeObj branchAttributes, float radius1,float radius2)
// Draw a cylinder subtending a node, using precomputed values from trig routine
// This is currently the only place in the code I need GL_LIGHTING on
// This is drawn in the original object coordinate system in which the tree is centered on 0,0
// TO DO enable attenuate on/off flag
// Not doing blending or lod_cutoff for tubes yet
// Currently doing the lod_cutoff for branchStyle==line only ; makes a big difference
{
extern GLUquadricObj *qobj;
GLfloat params[4];
GLboolean valid;
float darkness;
float xdist,ydist,zdist;
float sknots[8] = { 0,0,0,0,1,1,1,1};
GLfloat ctlpoints[4][4]; // four control points = 2 end points + two "control" points
area A,Aanc;
double dx,dy,dz,zr,xcross,ycross,theta, color, color_anc;
A=(area)(a->data);
float r1,r2,z1,z2;
if (branchAttributes->branchCurvy == nurbs) // set up control points
{
// TO DO. CURRENTLY THESE CONTROL POINTS ARE ALL IN A VERTICAL PLANE. MAKE THE TREE CURVIER YET BY MOVING THEM OFF THIS PLANE.
// Setting up the two endpoints of the edge; cubic spline will interpolate these two points
// NB. These are bogus for circle layout, because there is no variation in the z-axis there,
ctlpoints[0][0]=A->x_anc;
ctlpoints[0][1]=A->y_anc;
ctlpoints[0][2]=A->z_anc;
ctlpoints[0][3]=1.0;
ctlpoints[3][0]=A->x_center;
ctlpoints[3][1]=A->y_center;
ctlpoints[3][2]=A->z;
ctlpoints[3][3]=1.0;
// Setting up the two control points. These are each tweaked with a z parameter and an r parameter in the vertical plane
// defined by the two endpoints of the edge, such that both when (r,z) is (0,0) at anc node and (1,1) at desc node.
// So we need an (r,z) for each control point: r1,z1,r2,z2.
xdist = A->x_center - A->x_anc;
ydist = A->y_center - A->y_anc;
zdist = A->z - A->z_anc;
extern float gr1,gr2,gz1,gz2;
r1 = gr1; //branchAttributes->ctlpointParms[0];
z1 = gz1; //branchAttributes->ctlpointParms[1];
r2 = gr2; //branchAttributes->ctlpointParms[2];
z2 = gz2; //branchAttributes->ctlpointParms[3];
ctlpoints[1][0]=A->x_anc + xdist*r1;
ctlpoints[1][1]=A->y_anc + ydist*r1;
ctlpoints[1][2]=A->z_anc + zdist*z1;
ctlpoints[1][3]=1.0;
ctlpoints[2][0]=A->x_anc + xdist*r2;
ctlpoints[2][1]=A->y_anc + ydist*r2;
ctlpoints[2][2]=A->z_anc + zdist*z2;
ctlpoints[2][3]=1.0;
}
switch (branchAttributes->branchStyle)
{
case tube:
{
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
switch (branchAttributes->branchCurvy)
{
case nurbs:
{
if (a->marked)
{
darkness=1;
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
}
else
darkness = setColorWithAttenuationLineSegment(A->x_center,A->y_center,A->z, A->x_anc,A->y_anc,A->z_anc, &(branchAttributes->color[0]), branchAttributes->attenuateFactor);
// Turn off actual rendering here...no need to draw the line, just get callbacks...use GLU_tesselator
gluNurbsProperty(theNurbs,GLU_NURBS_MODE,GLU_NURBS_TESSELLATOR);
gluBeginCurve(theNurbs);
gluNurbsCurve(theNurbs, 8, sknots, 4, &ctlpoints[0][0], 4, GL_MAP1_VERTEX_4);
gluEndCurve(theNurbs);
gluNurbsProperty(theNurbs,GLU_NURBS_MODE,GLU_NURBS_RENDERER);
int i;
float gleColor[500][4];
double gleRadius[500];
for (i=0; i<gNpoints; i++) // set the vectors of colors and radii
{
if (gNpoints > 500) exit(1);
gleColor[i][0]= branchAttributes->color[0];
gleColor[i][1]= branchAttributes->color[1];
gleColor[i][2]= branchAttributes->color[2];
gleColor[i][3]= darkness; // don't seem to need this shit; taken care of by glMaterial
if (gNpoints > 1)
gleRadius[i] = radius1 + (radius2-radius1)*i/(gNpoints-1); // interpolate to vary radius between nodes of branch
else
gleRadius[i] = radius1;
}
params[0]=branchAttributes->color[0];
params[1]=branchAttributes->color[1];
params[2]=branchAttributes->color[2];
params[3]=darkness;
params[3]=1.0; //override for now; I don't like how the blending looks
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
//glEnable(GL_LINE_SMOOTH);
//glHint(GL_LINE_SMOOTH_HINT,GL_NICEST); // Antialiasing not working in this gle environment
//glEnable(GL_POLYGON_SMOOTH);
//glHint(GL_POLYGON_SMOOTH_HINT,GL_NICEST);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, params);
gleSetJoinStyle(TUBE_JN_ROUND) ;
//glePolyCylinder(gNpoints,gPoint_array,gleColor,radius2);
//glePolyCone_c4f(gNpoints,gPoint_array,gleColor,gleRadius);
// Note if we pass gleColor, that overrides the material color and its alpha blending;
// so to enable blending pass NULL in place of gleColor, and set glMaterial above
glePolyCone_c4f(gNpoints,gPoint_array,NULL,gleRadius);
//drawCylinder(gPoint_array[0][0],gPoint_array[0][1],gPoint_array[0][2], gPoint_array[1][0],gPoint_array[1][1],gPoint_array[1][2],radius1, radius1); // add gumby cyls at ends of gle cylinder
//drawCylinder(gPoint_array[gNpoints-2][0],gPoint_array[gNpoints-2][1],gPoint_array[gNpoints-2][2], gPoint_array[gNpoints-1][0],gPoint_array[gNpoints-1][1],gPoint_array[gNpoints-1][2],radius2, radius2);
// Because gle does not extrude at the two endpoints, I draw cylinders at each endpoint. To avoid gappiness at borders, I overlap the cylinder with the extruded tube by one segment (one point on the polyline), thus I run the cylinder from, e.g., point 0 to point 2, where the extrusion starts at 1.
drawCylinder(gPoint_array[0][0],gPoint_array[0][1],gPoint_array[0][2], gPoint_array[2][0],gPoint_array[2][1],gPoint_array[2][2],gleRadius[0], gleRadius[2]); // add gumby cyls at ends of gle cylinder
drawCylinder(gPoint_array[gNpoints-3][0],gPoint_array[gNpoints-3][1],gPoint_array[gNpoints-3][2], gPoint_array[gNpoints-1][0],gPoint_array[gNpoints-1][1],gPoint_array[gNpoints-1][2],gleRadius[gNpoints-3],gleRadius[gNpoints-1]);
//glDisable(GL_LIGHTING);
break;
}
case straight:
{
params[0]=branchAttributes->color[0];
params[1]=branchAttributes->color[1];
params[2]=branchAttributes->color[2];
params[3]=darkness;
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, params);
drawCylinder(A->x_anc,A->y_anc,A->z_anc, A->x_center,A->y_center,A->z, radius1, radius2);
break;
}
}
glDisable(GL_LIGHTING);
break;
}
case line:
{
if (!isRoot(a))
{
glLineWidth(branchAttributes->lineWidth);
if (a->marked)
{
darkness=1;
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glColor4f(branchAttributes->color[0],branchAttributes->color[1],branchAttributes->color[2],darkness);
}
else
darkness = setColorWithAttenuationLineSegment(A->x_center,A->y_center,A->z, A->x_anc,A->y_anc,A->z_anc, &(branchAttributes->color[0]), branchAttributes->attenuateFactor);
// there is similar code in function setColorWithAttenuation() in tree_openGL, but here we have something more elaborate...
switch (branchAttributes->branchCurvy)
{
case nurbs:
{
if (branchAttributes->lod_cutoff < darkness)
{
gluNurbsProperty(theNurbs,GLU_NURBS_MODE,GLU_NURBS_RENDERER);
gluBeginCurve(theNurbs);
gluNurbsCurve(theNurbs, 8, sknots, 4, &ctlpoints[0][0], 4, GL_MAP1_VERTEX_4);
gluEndCurve(theNurbs);
}
break;
}
case straight:
{
if (branchAttributes->lod_cutoff < darkness)
{
glBegin(GL_LINES);
glVertex3d(A->x_anc,A->y_anc,A->z_anc);
glVertex3d(A->x_center,A->y_center,A->z);
glEnd();
}
}
}
break;
}
}
}
}
void CMeter2DGraphView::DrawValueGraph()
{
TRACE_FUN( Frequently, "CMeter2DGraphView::DrawValueGraph" );
float meshWidth( model()->timeFrame() );
float meshHeight( model()->valueFrame() );
glViewport( _meshArea.x(), _meshArea.y(), _meshArea.width(), _meshArea.height() );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluOrtho2D( 0, meshWidth, 0, meshHeight );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glEnable( GL_LINE_SMOOTH );
glHint( GL_LINE_SMOOTH_HINT, GL_NICEST );
glColor4f( .0, .0, .0, .7 );
glLineWidth( width() / 400 );
const CMeter2DGraphModel::TValueTimeContainer& valueTimeContainer( model()->valueTimeContainer() );
int knotCount( valueTimeContainer.size() * 4 + 4 );
int pointCount( valueTimeContainer.size() * 4 * 3 );
float* knots( new float[ knotCount ] );
float* cpoints( new float[ pointCount + 12 ] );
int knot( 0 );
int timeOffset( int( rint( model()->timeOffset() ) ) );
for( CMeter2DGraphModel::TValueTimeContainer::const_iterator I_value( valueTimeContainer.begin() );
I_value != valueTimeContainer.end(); )
{
knots[ knot * 4 + 0 ] = knot;
knots[ knot * 4 + 1 ] = knot;
knots[ knot * 4 + 2 ] = knot;
knots[ knot * 4 + 3 ] = knot;
float xPoint( ( int( I_value->second ) + timeOffset ) / 1000. );
cpoints[ knot * 4 * 3 + 0 ] = xPoint;
cpoints[ knot * 4 * 3 + 1 ] = I_value->first;
cpoints[ knot * 4 * 3 + 2 ] = 0;
cpoints[ knot * 4 * 3 + 3 ] = xPoint;
cpoints[ knot * 4 * 3 + 4 ] = I_value->first;
cpoints[ knot * 4 * 3 + 5 ] = 0;
cpoints[ knot * 4 * 3 + 6 ] = xPoint;
cpoints[ knot * 4 * 3 + 7 ] = I_value->first;
cpoints[ knot * 4 * 3 + 8 ] = 0;
cpoints[ knot * 4 * 3 + 9 ] = xPoint;
cpoints[ knot * 4 * 3 + 10 ] = I_value->first;
cpoints[ knot * 4 * 3 + 11 ] = 0;
++I_value;
if( I_value != valueTimeContainer.end() )
{
float xPoint( ( int( I_value->second ) + timeOffset ) / 1000. );
cpoints[ knot * 4 * 3 + 6 ] = cpoints[ knot * 4 * 3 + 3 ];
cpoints[ knot * 4 * 3 + 3 ] = xPoint;
cpoints[ knot * 4 * 3 + 7 ] = cpoints[ knot * 4 * 3 + 4 ];
cpoints[ knot * 4 * 3 + 4 ] = I_value->first;
cpoints[ knot * 4 * 3 + 8 ] = 0;
///////////////////////////////////////////////////////////////////////////////////
float xcorr( ( cpoints[ knot * 4 * 3 + 3 ] - cpoints[ knot * 4 * 3 + 6 ] ) * .6 );
cpoints[ knot * 4 * 3 + 3 ] -= xcorr;
cpoints[ knot * 4 * 3 + 6 ] += xcorr;
float ycorr( ( cpoints[ knot * 4 * 3 + 4 ] - cpoints[ knot * 4 * 3 + 7 ] ) * 1. );
cpoints[ knot * 4 * 3 + 4 ] -= ycorr;
cpoints[ knot * 4 * 3 + 7 ] += ycorr;
///////////////////////////////////////////////////////////////////////////////////
cpoints[ knot * 4 * 3 + 9 ] = xPoint;
cpoints[ knot * 4 * 3 + 10 ] = I_value->first;
cpoints[ knot * 4 * 3 + 11 ] = 0;
}
++knot;
}
knots[ knot * 4 + 0 ] = knot;
knots[ knot * 4 + 1 ] = knot;
knots[ knot * 4 + 2 ] = knot;
knots[ knot * 4 + 3 ] = knot;
gluBeginCurve( _nurbsRenderer );
gluNurbsCurve( _nurbsRenderer, knotCount, knots, 3, cpoints, 4, GL_MAP1_VERTEX_3 );
gluEndCurve( _nurbsRenderer );
delete[] cpoints;
delete[] knots;
}