/*
* $Id: gpd.c,v 2.0 2004/11/09 12:30:24 bernhard Exp $
*/

/*  gpd.c
    Bill Brown, USACERL  
    December 1993
*/

#include <stdio.h>
#include <stdlib.h>

#include "gstypes.h"
#include "rowcol.h"

#define CHK_FREQ 50

/* BOB -- border allowed outside of viewport*/
#define v_border 50

/* check for cancel every CHK_FREQ points */

int gs_point_in_region(geosurf * gs, float *pt, float *region)
{
    float top, bottom, left, right;

    if (!region) {
	top = gs->yrange;
	bottom = VROW2Y(gs, VROWS(gs));
	left = 0.0;
	right = VCOL2X(gs, VCOLS(gs));
    }
    else {
	top = region[0];
	bottom = region[1];
	left = region[2];
	right = region[3];
    }

    return (pt[X] >= left && pt[X] <= right &&
	    pt[Y] >= bottom && pt[Y] <= top);
}

/* TODO: add size1, size2 & dir1, dir2 (eg azimuth, elevation) variables
*/
/* do normal transforms before calling */
/* Note gs: NULL if 3d obj or const elev surface */
void gpd_obj(geosurf * gs, int color, float size, int marker, Point3 pt)
{
    float sz, lpt[3];

    gsd_color_func(color);
    sz = GS_global_exag();
    GS_v3eq(lpt, pt);		/* CHANGING Z OF POINT PASSED, so use copy */

    switch (marker) {
    case ST_DIAMOND:
	/*
	   gsd_colormode(CM_AD);
	 */
	gsd_colormode(CM_DIFFUSE);
	gsd_pushmatrix();

	if (sz) {
	    lpt[Z] *= sz;
	    gsd_scale(1.0, 1.0, 1. / sz);
	}

	gsd_diamond(lpt, color, size);
	gsd_popmatrix();
	gsd_colormode(CM_COLOR);

	break;
    case ST_BOX:

	break;
    case ST_SPHERE:
	/*
	   gsd_colormode(CM_AD);
	 */
	gsd_colormode(CM_DIFFUSE);
	gsd_pushmatrix();

	if (sz) {
	    lpt[Z] *= sz;
	    gsd_scale(1.0, 1.0, 1. / sz);
	}

	gsd_sphere(lpt, size);
	gsd_popmatrix();
	gsd_colormode(CM_COLOR);

	break;
    case ST_GYRO:
	gsd_colormode(CM_COLOR);
	gsd_pushmatrix();

	if (sz) {
	    lpt[Z] *= sz;
	    gsd_scale(1.0, 1.0, 1. / sz);
	}

	gsd_draw_gyro(lpt, color, size);
	gsd_popmatrix();

	break;
    case ST_ASTER:
	gsd_colormode(CM_COLOR);
	gsd_pushmatrix();

	if (sz) {
	    lpt[Z] *= sz;
	    gsd_scale(1.0, 1.0, 1. / sz);
	}

	gsd_draw_asterisk(lpt, color, size);
	gsd_popmatrix();

	break;
    case ST_CUBE:

	break;
    default:
    case ST_X:
	gsd_colormode(CM_COLOR);
	gsd_x(gs, lpt, color, size);

	break;
    }

    return;
}

/* need to think about translations - If user translates surface,
sites should automatically go with it, but translating sites should
translate it relative to surface on which it's displayed */
/*  TODO: prevent scaling by 0  */
/* handling mask checking here */
int gpd_2dsite(geosite * gp, geosurf * gs, int do_fast)
{
    float site[3], konst;
    float size;
    int src, check, marker, color;
    geopoint *gpt;
    typbuff *buf;
    GLdouble modelMatrix[16], projMatrix[16];
    GLint viewport[4];
    GLint window[4];


    if (GS_check_cancel()) {
	return (0);
    }

    if (gs) {
	gs_update_curmask(gs);

	src = gs_get_att_src(gs, ATT_TOPO);

	if (src == CONST_ATT) {
	    konst = gs->att[ATT_TOPO].constant;
	    site[Z] = konst;
	}
	else {
	    buf = gs_get_att_typbuff(gs, ATT_TOPO, 0);
	}

	/* Get viewport parameters for view check */
	gsd_getwindow(&window, &viewport, &modelMatrix, &projMatrix);

	gsd_pushmatrix();

	gsd_do_scale(1);

	gsd_translate(gs->x_trans, gs->y_trans, gs->z_trans);

	gsd_linewidth(gp->width);

	check = 0;
	color = gp->color;
	marker = gp->marker;
	size = gp->size;

	for (gpt = gp->points; gpt; gpt = gpt->next) {
	    if (!(++check % CHK_FREQ)) {
		if (GS_check_cancel()) {
		    gsd_linewidth(1);
		    gsd_popmatrix();

		    return (0);
		}
	    }

	    site[X] = gpt->p3[X] + gp->x_trans - gs->ox;
	    site[Y] = gpt->p3[Y] + gp->y_trans - gs->oy;

	    if (gs_point_is_masked(gs, site)) {
		continue;
	    }

	    /* TODO: set other dynamic attributes */
	    if (gp->attr_mode & ST_ATT_COLOR) {
		color = gpt->iattr;
	    }

	    if (src == MAP_ATT) {
		if (viewcell_tri_interp(gs, buf, site, 1)) {
		    /* returns 0 if outside or masked */
		    site[Z] += gp->z_trans;

		    if (gsd_checkpoint
			(site, window, viewport, modelMatrix, projMatrix))
			continue;
		    else
			gpd_obj(gs, color, size, marker, site);
		}
	    }
	    else if (src == CONST_ATT) {
		if (gs_point_in_region(gs, site, NULL)) {
		    site[Z] += gp->z_trans;
		    if (gsd_checkpoint
			(site, window, viewport, modelMatrix, projMatrix))
			continue;
		    else
			gpd_obj(NULL, color, size, marker, site);
		}
	    }
	}

	gsd_linewidth(1);
	gsd_popmatrix();
    }

    return (1);
}

int gpd_3dsite(geosite * gp, float xo, float yo, int do_fast)
{
    float site[3], tz;
    float size;
    int check, color, marker;
    geopoint *gpt;
    GLdouble modelMatrix[16], projMatrix[16];
    GLint viewport[4];
    GLint window[4];

    if (GS_check_cancel()) {
	return (0);
    }

    gsd_getwindow(&window, &viewport, &modelMatrix, &projMatrix);

    gsd_pushmatrix();

    gsd_do_scale(1);

    tz = GS_global_exag();
    site[Z] = 0.0;

    check = 0;
    color = gp->color;
    marker = gp->marker;
    size = gp->size;

    gsd_linewidth(gp->width);

    for (gpt = gp->points; gpt; gpt = gpt->next) {
	if (!(++check % CHK_FREQ)) {
	    if (GS_check_cancel()) {
		gsd_linewidth(1);
		gsd_popmatrix();

		return (0);
	    }
	}

	site[X] = gpt->p3[X] + gp->x_trans - xo;
	site[Y] = gpt->p3[Y] + gp->y_trans - yo;

	if (tz) {
	    site[Z] = gpt->p3[Z] + gp->z_trans;
	}

	/* TODO: set other dynamic attributes */
	if (gp->attr_mode & ST_ATT_COLOR) {
	    color = gpt->iattr;
	}

	if (gsd_checkpoint(site, window, viewport, modelMatrix, projMatrix))
	    continue;
	else
	    /* clip points outside default region? */
	    gpd_obj(NULL, color, size, marker, site);
    }

    gsd_linewidth(1);
    gsd_popmatrix();

    return (1);
}