depthcue.c

Intro/: Directory containing introductory examples. HelloWorld.c A simple program that draws a bo

#include <phigs.h>			/* get HP-PHIGS definitions for C */
#include <stdio.h>			/* get standard I/O definitions */
#include <math.h>			/* link with library "-lm" */

#define deg 				*3.1415926535897932384/180

main()					/* file "DepthCue.c" */
{
    Pint	WorkstnID = 1;		/* workstation identifier */
    Pint	ConnID;			/* connection identifier */
    Pint	WorkstnType = POIDDX;	/* out/in, direct, dbl bfr, Xwindow */
    Pint	Cube = 1, Scene = 2;	/* structure IDs */
    static Ppoint3	TopPts[5] =
       {{-1.0,  1.0, -1.0}, {-1.0,  1.0,  1.0}, { 0.0,  1.0,  1.0},
	{ 1.0,  1.0,  0.0}, { 1.0,  1.0, -1.0}};
    static Ppoint_list3	Top = {5, TopPts};
    static Ppoint3	BottomPts[4] =
       {{-1.0, -1.0,  1.0}, {-1.0, -1.0, -1.0}, { 1.0, -1.0, -1.0},
	{ 1.0, -1.0,  1.0}};
    static Ppoint_list3	Bottom = {4, BottomPts};
    static Ppoint3	RightPts[5] =
       {{ 1.0, -1.0, -1.0}, { 1.0,  1.0, -1.0}, { 1.0,  1.0,  0.0},
	{ 1.0,  0.0,  1.0}, { 1.0, -1.0,  1.0}};
    static Ppoint_list3	Right = {5, RightPts};
    static Ppoint3	LeftPts[4] =
       {{-1.0, -1.0,  1.0}, {-1.0,  1.0,  1.0}, {-1.0,  1.0, -1.0},
	{-1.0, -1.0, -1.0}};
    static Ppoint_list3	Left = {4, LeftPts};
    static Ppoint3	FrontPts[5] =
       {{ 1.0, -1.0,  1.0}, { 1.0,  0.0,  1.0}, { 0.0,  1.0,  1.0},
	{-1.0,  1.0,  1.0}, {-1.0, -1.0,  1.0}};
    static Ppoint_list3	Front = {5, FrontPts};
    static Ppoint3	BackPts[4] =
       {{-1.0, -1.0, -1.0}, {-1.0,  1.0, -1.0}, { 1.0,  1.0, -1.0},
	{ 1.0, -1.0, -1.0}};
    static Ppoint_list3	Back = {4, BackPts};
    static Ppoint3	CornerPts[3] =
       {{ 1.0,  0.0,  1.0}, { 1.0,  1.0,  0.0}, { 0.0,  1.0,  1.0}};
    static Ppoint_list3	Corner = {3, CornerPts};
    Pdepth_cue_rep	DepthCueRep;		/* depth-cueing info holder */
    Pmatrix3		xform;			/* transformation matrix */
    static Pcolr_rep	White =	{1.0, 1.0, 1.0};/* RGB for white; for lines */
    Pvec3		Vector;			/* for scaling/translation */
    Pint		Error;			/* error-return variable */

    popen_phigs((char *) stderr, 0);		/* errors go to "stderr" */
    pescape_u4("/dev/screen/phigs_window", &ConnID);
    popen_ws(WorkstnID, (void *) ConnID, WorkstnType);
    pescape_u250(WorkstnID, 0);			/* set colour env: direct */
    pset_colr_rep(WorkstnID, 1, &White);
    /*--- set depth cue representation for entry 1 -------------------------*/
    DepthCueRep.mode = PDEPTH_CUE_ALLOWED;
    DepthCueRep.ref_planes[0] = 0.25;
    DepthCueRep.ref_planes[1] = 0.75;
    DepthCueRep.scale[0] = 0.0;
    DepthCueRep.scale[1] = 1.0;
    DepthCueRep.gcolr.colr_type = PCOLR_RGB;
    DepthCueRep.gcolr.colr_value.colr_rep.rgb.red   = 0.3;
    DepthCueRep.gcolr.colr_value.colr_rep.rgb.green = 0.3;
    DepthCueRep.gcolr.colr_value.colr_rep.rgb.blue  = 0.3;
    pset_depth_cue_rep(WorkstnID, 1, &DepthCueRep);
    /*--- define the Cube structure ----------------------------------------*/
    popen_struct(Cube);
    Vector.delta_x = 0.25, Vector.delta_y = 0.5, Vector.delta_z = 0.5;
    pscale3(&Vector, &Error, xform);
    if (Error) printf("Error %d in first pscale3.\n", Error), exit(1);
    pset_local_tran3(xform, PTYPE_REPLACE);
    Vector.delta_x = 0.7, Vector.delta_y = 0.7, Vector.delta_z = 0.7;
    pscale3(&Vector, &Error, xform);
    if (Error) printf("Error %d in second pscale3.\n", Error), exit(1);
    pset_local_tran3(xform, PTYPE_POSTCONCAT);
    protate_y(10 deg, &Error, xform);
    if (Error) printf("Error %d in protate_y.\n", Error), exit(1);
    pset_local_tran3(xform, PTYPE_POSTCONCAT);
    protate_x(10 deg, &Error, xform);
    if (Error) printf("Error %d in protate_x.\n", Error), exit(1);
    pset_local_tran3(xform, PTYPE_POSTCONCAT);
    Vector.delta_x = 0.5, Vector.delta_y = 0.5, Vector.delta_z = 0.5;
    ptranslate3(&Vector, &Error, xform);
    if (Error) printf("Error %d in ptranslate3.\n", Error), exit(1);
    pset_local_tran3(xform, PTYPE_POSTCONCAT);
    pfill_area3(&Top);
    pfill_area3(&Bottom);
    pfill_area3(&Back);
    pfill_area3(&Right);
    pfill_area3(&Left);
    pfill_area3(&Front);
    pfill_area3(&Corner);
    pclose_struct();
    /*--- open the Scene structure -----------------------------------------*/
    popen_struct(Scene);
    pset_depth_cue_ind(1);
    pset_edge_flag(PEDGE_ON);
    pset_int_style(PSTYLE_HOLLOW);
    pexec_struct(Cube);
    pclose_struct();
    ppost_struct(WorkstnID, Scene, 1.0);
    pclose_ws(WorkstnID);
    pclose_phigs();
}