line()

void line(float x1, float y1, float x2, float y2); void line(float,float,float,float); void line(float,float,float,float,float,float); inline void line(A x1,B y1,C x2,D y2){ _api::line((float)x1,(float)y1,(float)x2,(float)y2); inline void line(A x1,B y1,C z1,D x2,E y2,F z2){ _api::line((float)x1,(float)y1,(float)z1,(float)x2,(float)y2,(float)z2); void line(float x1, float y1, float z1, float x2, float y2, float z2); template<typename A,typename B,typename C,typename D,typename=std::enable_if_t<std::is_arithmetic_v<A>&&std::is_arithmetic_v<B>&&std::is_arithmetic_v<C>&&std::is_arithmetic_v<D>>> void line(A x1,B y1,C x2,D y2){ line((float)x1,(float)y1,(float)x2,(float)y2); template<typename A,typename B,typename C,typename D,typename E,typename F,typename=std::enable_if_t<std::is_arithmetic_v<A>&&std::is_arithmetic_v<B>&&std::is_arithmetic_v<C>&&std::is_arithmetic_v<D>&&std::is_arithmetic_v<E>&&std::is_arithmetic_v<F>>> void line(A x1,B y1,C z1,D x2,E y2,F z2){ line((float)x1,(float)y1,(float)z1,(float)x2,(float)y2,(float)z2); inline void line(float x1,float y1,float x2,float y2){ if(PApplet::g_papplet) PApplet::g_papplet->line(x1,y1,x2,y2); } inline void line(float x1,float y1,float z1,float x2,float y2,float z2){ if(PApplet::g_papplet) PApplet::g_papplet->line(x1,y1,z1,x2,y2,z2); } inline void PGraphics::line(float x1, float y1, float x2, float y2) { if(PApplet::g_papplet) PApplet::g_papplet->line(x1,y1,x2,y2); }

void PApplet::line(float x1, float y1, float x2, float y2) { { GLint mvDepth=0, projDepth=0; glGetIntegerv(GL_MODELVIEW_STACK_DEPTH, &mvDepth); glGetIntegerv(GL_PROJECTION_STACK_DEPTH, &projDepth); double mv[16], proj[16]; glGetDoublev(GL_MODELVIEW_MATRIX, mv); glGetDoublev(GL_PROJECTION_MATRIX, proj); GLint vp[4]; glGetIntegerv(GL_VIEWPORT, vp); GLint curFbo=0; glGetIntegerv(GL_FRAMEBUFFER_BINDING, &curFbo); PDEBUG("PApplet::line(%.1f,%.1f,%.1f,%.1f) ENTRY: mvDepth=%d projDepth=%d curFbo=%d viewport=(%d,%d,%d,%d)\n", x1,y1,x2,y2, mvDepth, projDepth, curFbo, vp[0],vp[1],vp[2],vp[3]); PDEBUG(" mv[0]=%.3f mv[5]=%.3f mv[12]=%.3f mv[13]=%.3f\n", mv[0],mv[5],mv[12],mv[13]); PDEBUG(" proj[0]=%.6f proj[5]=%.6f proj[12]=%.6f proj[13]=%.6f\n", proj[0],proj[5],proj[12],proj[13]); } if (!doStroke) return; applyStroke(); float w = strokeW; if (w <= 1.0f) { // Thin lines: use GL_LINES glLineWidth(1.0f); glBegin(GL_LINES); glVertex2f(x1,y1); glVertex2f(x2,y2); glEnd(); restoreLighting(); return; } // Thick line: quad body + round caps using stencil to prevent double-blend float dx = x2-x1, dy = y2-y1; float len = std::sqrt(dx*dx+dy*dy); if(len < 0.0001f){ restoreLighting(); return; } float ux = dx/len, uy = dy/len; float r = w*0.5f; float px2 = -uy*r, py2 = ux*r; // perpendicular int segs = std::max(16, (int)(r*4.0f)); // Use stencil to draw all geometry, then fill once -- prevents double-blend glEnable(GL_STENCIL_TEST); glClearStencil(0); glClear(GL_STENCIL_BUFFER_BIT); glStencilFunc(GL_ALWAYS, 1, 0xFF); glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE); glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE); // Draw body into stencil glBegin(GL_QUADS); glVertex2f(x1+px2,y1+py2); glVertex2f(x2+px2,y2+py2); glVertex2f(x2-px2,y2-py2); glVertex2f(x1-px2,y1-py2); glEnd(); // Draw end caps into stencil for(int ep=0;ep<2;ep++){ float cx2=ep?x2:x1, cy2=ep?y2:y1; glBegin(GL_TRIANGLE_FAN); glVertex2f(cx2,cy2); for(int s=0;s<=segs;s++){ float a=s*TWO_PI/segs; glVertex2f(cx2+std::cos(a)*r, cy2+std::sin(a)*r); } glEnd(); } // Now draw color only where stencil=1 glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE); glStencilFunc(GL_EQUAL, 1, 0xFF); glStencilOp(GL_KEEP,GL_KEEP,GL_KEEP); glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA); // Fill bounding box with stroke color float minx=std::min(x1,x2)-r, maxx=std::max(x1,x2)+r; float miny=std::min(y1,y2)-r, maxy=std::max(y1,y2)+r; glBegin(GL_QUADS); glVertex2f(minx,miny); glVertex2f(maxx,miny); glVertex2f(maxx,maxy); glVertex2f(minx,maxy); glEnd(); glDisable(GL_STENCIL_TEST); restoreLighting(); } void PApplet::line(float x1, float y1, float z1, float x2, float y2, float z2) { if (!doStroke) return; applyStroke(); glLineWidth(strokeW); glBegin(GL_LINES); glVertex3f(x1,y1,z1); glVertex3f(x2,y2,z2); glEnd(); restoreLighting(); } std::string line; line = charLine; line = tok; line = candidate; std::string curMat, line; std::string line(buf);