154 lines
3.5 KiB
C++
154 lines
3.5 KiB
C++
#include "solvespace.h"
|
|
|
|
// A public-domain Hershey vector font ("Simplex").
|
|
#include "font.table"
|
|
|
|
static bool ColorLocked;
|
|
|
|
#define FONT_SCALE (0.5)
|
|
static int StrWidth(char *str) {
|
|
int w = 0;
|
|
for(; *str; str++) {
|
|
int c = *str;
|
|
if(c < 32 || c > 126) c = 32;
|
|
c -= 32;
|
|
|
|
w += Font[c].width;
|
|
}
|
|
return w;
|
|
}
|
|
void glxWriteTextRefCenter(char *str)
|
|
{
|
|
double scale = FONT_SCALE/SS.GW.scale;
|
|
// The characters have height ~21, as they appear in the table.
|
|
double fh = (21.0)*scale;
|
|
double fw = StrWidth(str)*scale;
|
|
glPushMatrix();
|
|
glTranslated(-fw/2, -fh/2, 0);
|
|
// Undo the (+5, +5) offset that glxWriteText applies.
|
|
glTranslated(-5*scale, -5*scale, 0);
|
|
glxWriteText(str);
|
|
glPopMatrix();
|
|
}
|
|
|
|
void glxWriteText(char *str)
|
|
{
|
|
double scale = FONT_SCALE/SS.GW.scale;
|
|
int xo = 5;
|
|
int yo = 5;
|
|
|
|
for(; *str; str++) {
|
|
int c = *str;
|
|
if(c < 32 || c > 126) c = 32;
|
|
|
|
c -= 32;
|
|
|
|
glBegin(GL_LINE_STRIP);
|
|
int j;
|
|
for(j = 0; j < Font[c].points; j++) {
|
|
int x = Font[c].coord[j*2];
|
|
int y = Font[c].coord[j*2+1];
|
|
|
|
if(x == PEN_UP && y == PEN_UP) {
|
|
glEnd();
|
|
glBegin(GL_LINE_STRIP);
|
|
} else {
|
|
glVertex3d((xo + x)*scale, (yo + y)*scale, 0);
|
|
}
|
|
}
|
|
glEnd();
|
|
|
|
xo += Font[c].width;
|
|
}
|
|
}
|
|
|
|
void glxVertex3v(Vector u)
|
|
{
|
|
glVertex3f((GLfloat)u.x, (GLfloat)u.y, (GLfloat)u.z);
|
|
}
|
|
|
|
void glxTranslatev(Vector u)
|
|
{
|
|
glTranslated((GLdouble)u.x, (GLdouble)u.y, (GLdouble)u.z);
|
|
}
|
|
|
|
void glxOntoWorkplane(Vector u, Vector v)
|
|
{
|
|
u = u.WithMagnitude(1);
|
|
v = v.WithMagnitude(1);
|
|
|
|
double mat[16];
|
|
Vector n = u.Cross(v);
|
|
MakeMatrix(mat, u.x, v.x, n.x, 0,
|
|
u.y, v.y, n.y, 0,
|
|
u.z, v.z, n.z, 0,
|
|
0, 0, 0, 1);
|
|
glMultMatrixd(mat);
|
|
}
|
|
|
|
void glxLockColorTo(double r, double g, double b)
|
|
{
|
|
ColorLocked = false;
|
|
glxColor3d(r, g, b);
|
|
ColorLocked = true;
|
|
}
|
|
|
|
void glxUnlockColor(void)
|
|
{
|
|
ColorLocked = false;
|
|
}
|
|
|
|
void glxColor3d(double r, double g, double b)
|
|
{
|
|
if(!ColorLocked) glColor3d(r, g, b);
|
|
}
|
|
|
|
void glxColor4d(double r, double g, double b, double a)
|
|
{
|
|
if(!ColorLocked) glColor4d(r, g, b, a);
|
|
}
|
|
|
|
static void __stdcall Vertex(Vector *p) {
|
|
glxVertex3v(*p);
|
|
}
|
|
static void __stdcall Combine(double coords[3], void *vertexData[4],
|
|
float weight[4], void **outData)
|
|
{
|
|
Vector *n = (Vector *)AllocTemporary(sizeof(Vector));
|
|
n->x = coords[0];
|
|
n->y = coords[1];
|
|
n->z = coords[2];
|
|
|
|
*outData = n;
|
|
}
|
|
void glxFillPolygon(SPolygon *p)
|
|
{
|
|
int i, j;
|
|
|
|
GLUtesselator *gt = gluNewTess();
|
|
typedef void __stdcall cf(void);
|
|
gluTessCallback(gt, GLU_TESS_BEGIN, (cf *)glBegin);
|
|
gluTessCallback(gt, GLU_TESS_END, (cf *)glEnd);
|
|
gluTessCallback(gt, GLU_TESS_VERTEX, (cf *)Vertex);
|
|
gluTessCallback(gt, GLU_TESS_COMBINE, (cf *)Combine);
|
|
gluTessProperty(gt, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_ODD);
|
|
|
|
gluTessBeginPolygon(gt, NULL);
|
|
for(i = 0; i < p->l.n; i++) {
|
|
SContour *sc = &(p->l.elem[i]);
|
|
gluTessBeginContour(gt);
|
|
for(j = 0; j < (sc->l.n-1); j++) {
|
|
SPoint *sp = &(sc->l.elem[j]);
|
|
double ap[3];
|
|
ap[0] = sp->p.x;
|
|
ap[1] = sp->p.y;
|
|
ap[2] = sp->p.z;
|
|
gluTessVertex(gt, ap, &(sp->p));
|
|
}
|
|
gluTessEndContour(gt);
|
|
}
|
|
gluTessEndPolygon(gt);
|
|
gluDeleteTess(gt);
|
|
}
|
|
|