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[Plplot-cvs] plplot/src plsym.c,1.54,1.55
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From: hbabcock <hba...@us...> - 2007-03-14 00:38:32
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Update of /cvsroot/plplot/plplot/src In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv13839/src Modified Files: plsym.c Log Message: Added plmtex3, the 3D equivalent of plmtex, to the PLplot API Index: plsym.c =================================================================== RCS file: /cvsroot/plplot/plplot/src/plsym.c,v retrieving revision 1.54 retrieving revision 1.55 diff -u -d -r1.54 -r1.55 --- plsym.c 29 Nov 2006 04:01:52 -0000 1.54 +++ plsym.c 14 Mar 2007 00:38:31 -0000 1.55 @@ -10,6 +10,7 @@ Copyright (C) 2001, 2003, 2004 Rafael Laboissiere Copyright (C) 2002 Vincent Darley Copyright (C) 2004 Andrew Ross + Copyright (C) 2007 Hazen Babcock This file is part of PLplot. @@ -1231,6 +1232,346 @@ return(NULL); } +/*--------------------------------------------------------------------------*\ + * void plmtex3() + * + * This is the 3d equivalent of plmtex(). It prints out "text" at specified + * position relative to viewport (may be inside or outside) + * + * side String contains one or more of the following characters + * x,y,z : Specify which axis is to be labeled + * p,s : Label the "primary" or the "secondary" axis. The "primary" axis + * being somewhat arbitrary, but basically it is the one that you'd + * expect to labeled in a 3d graph of standard orientation. Example: + * for z this would be the left hand axis. + * v : draw the text perpendicular to the axis. + * + * disp Displacement from specified edge of axis, measured outwards from + * the axis in units of the current character height. The + * centerlines of the characters are aligned with the specified + * position. + * + * pos Position of the reference point of the string relative to the + * axis ends, ranging from 0.0 (left-hand end) to 1.0 (right-hand + * end) + * + * just Justification of string relative to reference point + * just = 0.0 => left hand edge of string is at reference + * just = 1.0 => right hand edge of string is at reference + * just = 0.5 => center of string is at reference + * + * All calculations are done in physical coordinates. + * +\*--------------------------------------------------------------------------*/ + +void +c_plmtex3(const char *side, PLFLT disp, PLFLT pos, PLFLT just, const char *text) +{ + // local storage + PLFLT xmin, xmax, ymin, ymax, zmin, zmax, zscale; +// PLFLT cxx, cxy, cyx, cyy, cyz; + PLFLT chrdef, chrht; + + // calculated + PLFLT xpc, ypc, xrefpc, yrefpc; + PLFLT epx1, epy1, epx2, epy2, epx3, epy3; + PLFLT dispx, dispy, xform[4]; + PLFLT shift, theta, temp; + + // check that the plotting environment is set up + if (plsc->level < 3) { + plabort("plmtex3: Please set up window first"); + return; + } + + // get plotting environment information +// plP_gw3wc(&cxx, &cxy, &cyx, &cyy, &cyz); + plP_gdom(&xmin, &xmax, &ymin, &ymax); + plP_grange(&zscale, &zmin, &zmax); + plgchr(&chrdef, &chrht); + + // handle x/y axises + if((plP_stindex(side, "x") != -1)||(plP_stindex(side, "y") != -1)){ + + // get the locations of the end points of the relevant axis + + // x axis label + if(plP_stindex(side, "x") != -1){ + + // primary + if(plP_stindex(side, "p") != -1){ + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmin)); + epx2 = plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmin)); + } else { + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmin)); + epx2 = plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmin)); + } + } else { + + if(plP_stindex(side, "p") != -1){ + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmin)); + epx2 = plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmin)); + } else { + epx1 = plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmin)); + epx2 = plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmin)); + } + } + + // text always goes from left to right + if(epx1 > epx2){ + temp = epx1; + epx1 = epx2; + epx2 = temp; + temp = epy1; + epy1 = epy2; + epy2 = temp; + // recalculate position assuming the user specified + // it in the min -> max direction of the axis. + pos = 1.0 - pos; + } + + // calculate location of text center point + + // 1. calculate the angle of the axis we are to + // draw the text on relative to the horizontal + + if((epx2-epx1)!=0.0){ + theta = atan((epy2 - epy1)/(epx2 - epx1)); + } else { + if(epy2 > epy1){ + theta = 0.5 * PI; + } else { + theta = -0.5 * PI; + } + } + + // 2. calculate the perpendicular vector + + dispy = disp * chrht; + + // 3. calculate x & y center points + + xpc = pos * (epx2 - epx1) + epx1; + ypc = pos * (epy2 - epy1) + epy1; + + // 4. compute reference point + // It appears that drivers that cannot handle text justification + // use this as the starting point of the string. + // Calculations must be done in millimeters for this part + // so we convert to mm, do the calculation and convert back. + // The calculation is also dependent of the orientation + // (perpendicular or parallel) of the text. + + xpc = plP_dcmmx(plP_pcdcx(xpc)); + ypc = plP_dcmmy(plP_pcdcy(ypc)) - dispy; + + shift = plstrl(text) * just; + + if(plP_stindex(side, "v") != -1){ + xrefpc = xpc; + yrefpc = ypc - shift; + } else { + xrefpc = xpc - cos(theta) * shift; + yrefpc = ypc - sin(theta) * shift; + } + + xpc = plP_mmpcx(xpc); + ypc = plP_mmpcy(ypc); + xrefpc = plP_mmpcx(xrefpc); + yrefpc = plP_mmpcy(yrefpc); + + // 5. compute transform matrix & draw text + + // perpendicular, rotate 90 degrees & shear + + if(plP_stindex(side, "v") != -1){ + xform[0] = 0.0; + xform[1] = -1.0; + xform[2] = 1.0; + xform[3] = -sin(theta); + plP_text(0, just, xform, xpc, ypc, xrefpc, yrefpc, text); + } + + // parallel, rotate & shear by angle + else { + xform[0] = cos(theta); + xform[1] = cos(theta)*sin(theta) - sin(theta); + xform[2] = sin(theta); + xform[3] = sin(theta)*sin(theta) + cos(theta); + + plP_text(0, just, xform, xpc, ypc, xrefpc, yrefpc, text); + } + } + + // handle z axises + if(plP_stindex(side, "z") != -1){ + + // Find the left most of the 4 z axis options for "primary" + // Also find the location of frontmost point in the graph, + // which will be needed to calculate at what angle to shear + // the text. + + if(plP_stindex(side, "p") != -1){ + + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmin)); + + if(plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)) < epx1){ + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmin, ymin, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmin)); + } + + if(plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)) < epx1){ + epx1 = plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmin)); + } + + if(plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)) < epx1){ + epx1 = plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmin)); + } + } + + // find the right most of the 4 z axis options for "primary" + if(plP_stindex(side, "s") != -1){ + + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmin)); + + if(plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)) > epx1){ + epx1 = plP_wcpcx(plP_w3wcx(xmin, ymax, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmin, ymax, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmin)); + } + + if(plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)) > epx1){ + epx1 = plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmin, ymin, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmin, ymin, zmin)); + } + + if(plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)) > epx1){ + epx1 = plP_wcpcx(plP_w3wcx(xmax, ymax, zmin)); + epy1 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmin)); + epy2 = plP_wcpcy(plP_w3wcy(xmax, ymax, zmax)); + epx3 = plP_wcpcx(plP_w3wcx(xmax, ymin, zmin)); + epy3 = plP_wcpcy(plP_w3wcy(xmax, ymin, zmin)); + } + } + + // Calculate location of text center point. + // This is very similiar for the z axis. + + // primary and secondary have to be handled separately here + + if(plP_stindex(side, "p") != -1){ + + // 1. Calculate the angle of the axis we are to + // draw the text on relative to the horizontal. + + if((epx3-epx1)!=0.0){ + theta = atan((epy3 - epy1)/(epx3 - epx1)); + } else { + if(epy3 > epy1){ + theta = 0.5 * PI; + } else { + theta = -0.5 * PI; + } + } + + // 2. Calculate the perpendicular vector. + + dispx = -cos(theta) * disp * chrht; + dispy = -sin(theta) * disp * chrht; + } else { + if((epx1-epx3)!=0.0){ + theta = -atan((epy3 - epy1)/(epx1 - epx3)); + } else { + if(epy3 > epy1){ + theta = -0.5 * PI; + } else { + theta = 0.5 * PI; + } + } + + dispx = cos(theta) * disp * chrht; + dispy = sin(theta) * disp * chrht; + } + + // 3. Calculate x & y center points. + + xpc = epx1; + ypc = pos * (epy2 - epy1) + epy1; + + // 4. Compute the reference point. + + xpc = plP_dcmmx(plP_pcdcx(xpc)) + dispx; + ypc = plP_dcmmy(plP_pcdcy(ypc)) + dispy; + + shift = plstrl(text) * just; + + if(plP_stindex(side, "v") != -1){ + xrefpc = xpc - cos(theta) * shift; + yrefpc = ypc - sin(theta) * shift; + } else { + xrefpc = xpc; + yrefpc = ypc - shift; + } + + xpc = plP_mmpcx(xpc); + ypc = plP_mmpcy(ypc); + xrefpc = plP_mmpcx(xrefpc); + yrefpc = plP_mmpcy(yrefpc); + + // 5. Compute transform matrix & draw text. + + if(plP_stindex(side, "v") != -1){ + xform[0] = cos(theta); + xform[1] = cos(theta)*sin(theta) - sin(theta); + xform[2] = sin(theta); + xform[3] = sin(theta)*sin(theta) + cos(theta); + + plP_text(0, just, xform, xpc, ypc, xrefpc, yrefpc, text); + } + + else { + xform[0] = 0.0; + xform[1] = -1.0; + xform[2] = 1.0; + xform[3] = -sin(theta); + + plP_text(0, just, xform, xpc, ypc, xrefpc, yrefpc, text); + } + + } +} #undef PLSYM_H #endif |