[brlcad-commits] SF.net SVN: brlcad:[39484] brlcad/trunk/src/liboptical
Open Source Solid Modeling CAD
Brought to you by:
brlcad
Menu
▾
▴
[brlcad-commits] SF.net SVN: brlcad:[39484] brlcad/trunk/src/liboptical
|
From: <eri...@us...> - 2010-05-28 20:07:25
|
Revision: 39484
http://brlcad.svn.sourceforge.net/brlcad/?rev=39484&view=rev
Author: erikgreenwald
Date: 2010-05-28 20:07:18 +0000 (Fri, 28 May 2010)
Log Message:
-----------
beginning of a "toon" shader.
Modified Paths:
--------------
brlcad/trunk/src/liboptical/Makefile.am
brlcad/trunk/src/liboptical/init.c
Added Paths:
-----------
brlcad/trunk/src/liboptical/sh_toon.c
Modified: brlcad/trunk/src/liboptical/Makefile.am
===================================================================
--- brlcad/trunk/src/liboptical/Makefile.am 2010-05-28 18:03:24 UTC (rev 39483)
+++ brlcad/trunk/src/liboptical/Makefile.am 2010-05-28 20:07:18 UTC (rev 39484)
@@ -32,6 +32,7 @@
sh_stxt.c \
sh_tcl.c \
sh_text.c \
+ sh_toon.c \
sh_toyota.c \
sh_treetherm.c \
sh_wood.c \
Modified: brlcad/trunk/src/liboptical/init.c
===================================================================
--- brlcad/trunk/src/liboptical/init.c 2010-05-28 18:03:24 UTC (rev 39483)
+++ brlcad/trunk/src/liboptical/init.c 2010-05-28 20:07:18 UTC (rev 39484)
@@ -86,6 +86,7 @@
MFUNCS( tthrm_mfuncs );
MFUNCS( flat_mfuncs );
MFUNCS( bbd_mfuncs );
+ MFUNCS( toon_mfuncs );
}
/*
Added: brlcad/trunk/src/liboptical/sh_toon.c
===================================================================
--- brlcad/trunk/src/liboptical/sh_toon.c (rev 0)
+++ brlcad/trunk/src/liboptical/sh_toon.c 2010-05-28 20:07:18 UTC (rev 39484)
@@ -0,0 +1,221 @@
+/* S H _ T O O N . C
+ * BRL-CAD
+ *
+ * Copyright (c) 2010-2010 United States Government as represented by
+ * the U.S. Army Research Laboratory.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; see the file named COPYING for more
+ * information.
+ */
+
+/** @file sh_toon.c
+ *
+ * uses simple binning based on the cosine between the ray and the vector from
+ * the hitpoint to the light. Might be improved by using hit location curvature
+ * and/or cosine between ray dir and hit point normal?
+ */
+
+#include "common.h"
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+
+#include "vmath.h"
+#include "raytrace.h"
+#include "rtprivate.h"
+#include "light.h"
+
+#define TOON_MAGIC 0x746F6F6E0A /* make this a unique number for each shader */
+#define CK_TOON_SP(_p) BU_CKMAG(_p, TOON_MAGIC, "toon_specific")
+
+/*
+ * the shader specific structure contains all variables which are unique
+ * to any particular use of the shader.
+ */
+struct toon_specific {
+ long magic; /* magic # for memory validity check, must come 1st */
+};
+
+/* The default values for the variables in the shader specific structure */
+const static
+struct toon_specific toon_defaults = {
+ TOON_MAGIC
+};
+
+#define SHDR_NULL ((struct toon_specific *)0)
+#define SHDR_O(m) bu_offsetof(struct toon_specific, m)
+#define SHDR_AO(m) bu_offsetofarray(struct toon_specific, m)
+
+
+/* description of how to parse/print the arguments to the shader
+ * There is at least one line here for each variable in the shader specific
+ * structure above
+ */
+struct bu_structparse toon_print_tab[] = {
+ {"", 0, (char *)0, 0, BU_STRUCTPARSE_FUNC_NULL }
+
+};
+struct bu_structparse toon_parse_tab[] = {
+ {"i", bu_byteoffset(toon_print_tab[0]), "toon_print_tab", 0, BU_STRUCTPARSE_FUNC_NULL },
+ {"", 0, (char *)0, 0, BU_STRUCTPARSE_FUNC_NULL }
+};
+
+HIDDEN int toon_setup(register struct region *rp, struct bu_vls *matparm, char **dpp, struct mfuncs *mfp, struct rt_i *rtip), toon_render(struct application *ap, struct partition *pp, struct shadework *swp, char *dp);
+HIDDEN void toon_print(register struct region *rp, char *dp), toon_free(char *cp);
+
+/* The "mfuncs" structure defines the external interface to the shader.
+ * Note that more than one shader "name" can be associated with a given
+ * shader by defining more than one mfuncs struct in this array.
+ * See sh_phong.c for an example of building more than one shader "name"
+ * from a set of source functions. There you will find that "glass" "mirror"
+ * and "plastic" are all names for the same shader with different default
+ * values for the parameters.
+ */
+struct mfuncs toon_mfuncs[] = {
+ {MF_MAGIC, "toon", 0, MFI_NORMAL|MFI_HIT|MFI_UV, 0,
+ toon_setup, toon_render, toon_print, toon_free },
+
+ {0, (char *)0, 0, 0, 0,
+ 0, 0, 0, 0 }
+};
+
+
+/* T O O N _ S E T U P
+ *
+ * This routine is called (at prep time)
+ * once for each region which uses this shader.
+ * Any shader-specific initialization should be done here.
+ *
+ * Returns:
+ * 1 success
+ * 0 success, but delete region
+ * -1 failure
+ */
+HIDDEN int
+toon_setup(register struct region *rp, struct bu_vls *matparm, char **dpp, struct mfuncs *mfp, struct rt_i *rtip)
+
+
+ /* pointer to reg_udata in *rp */
+
+ /* New since 4.4 release */
+{
+ register struct toon_specific *toon_sp;
+ mat_t tmp;
+ vect_t bb_min, bb_max, v_tmp;
+
+ /* check the arguments */
+ RT_CHECK_RTI(rtip);
+ BU_CK_VLS( matparm );
+ RT_CK_REGION(rp);
+
+ if (rdebug&RDEBUG_SHADE)
+ bu_log("toon_setup(%s)\n", rp->reg_name);
+
+ /* Get memory for the shader parameters and shader-specific data */
+ BU_GETSTRUCT( toon_sp, toon_specific );
+ *dpp = (char *)toon_sp;
+
+ /* initialize the default values for the shader */
+ memcpy(toon_sp, &toon_defaults, sizeof(struct toon_specific));
+
+ /* parse the user's arguments for this use of the shader. */
+ if (bu_struct_parse( matparm, toon_parse_tab, (char *)toon_sp ) < 0 )
+ return -1;
+
+ if (rdebug&RDEBUG_SHADE) {
+ bu_struct_print( " Parameters:", toon_print_tab, (char *)toon_sp );
+ }
+
+ return 1;
+}
+
+/*
+ * T O O N _ P R I N T
+ */
+HIDDEN void
+toon_print(register struct region *rp, char *dp)
+{
+ bu_struct_print( rp->reg_name, toon_print_tab, (char *)dp );
+}
+
+/*
+ * T O O N _ F R E E
+ */
+HIDDEN void
+toon_free(char *cp)
+{
+ bu_free( cp, "toon_specific" );
+}
+
+/*
+ * T O O N _ R E N D E R
+ *
+ * This is called (from viewshade() in shade.c) once for each hit point
+ * to be shaded. The purpose here is to fill in values in the shadework
+ * structure.
+ */
+int
+toon_render(struct application *ap, struct partition *pp, struct shadework *swp, char *dp)
+{
+ int i;
+ struct toon_specific *toon_sp = (struct toon_specific *)dp;
+ struct light_specific *lp;
+
+ /* check the validity of the arguments we got */
+ RT_AP_CHECK(ap);
+ RT_CHECK_PT(pp);
+ CK_TOON_SP(toon_sp);
+
+ if (rdebug&RDEBUG_SHADE)
+ bu_struct_print( "toon_render Parameters:", toon_print_tab, (char *)toon_sp );
+
+ /* probably need to set some swp values here to avoid the infinite recursion
+ * if specified lights exist. */
+ light_obs(ap, swp, MFI_HIT);
+
+ /* Consider effects of each light source */
+ for ( i=ap->a_rt_i->rti_nlights-1; i>=0; i-- ) {
+ fastf_t cosi, scale;
+
+ if ((lp = (struct light_specific *)swp->sw_visible[i]) == LIGHT_NULL )
+ continue;
+
+ cosi = VDOT(swp->sw_hit.hit_normal, swp->sw_tolight);
+ if(cosi <= 0.1) scale = 0.0;
+ else if(cosi <= 0.5) scale = 0.5;
+ else if(cosi <= 0.8) scale = 0.8;
+ else scale = 1.0;
+ VSCALE(swp->sw_color, swp->sw_color, scale);
+ return 1;
+ }
+
+ /* no paths to light source, so just paint it black */
+ VSETALL(swp->sw_color, 0);
+
+ if (swp->sw_reflect > 0 || swp->sw_transmit > 0 )
+ (void)rr_render( ap, pp, swp );
+ return 1;
+}
+
+/*
+ * Local Variables:
+ * mode: C
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * c-file-style: "stroustrup"
+ * End:
+ * ex: shiftwidth=4 tabstop=8
+ */
Property changes on: brlcad/trunk/src/liboptical/sh_toon.c
___________________________________________________________________
Added: svn:mime-type
+ text/plain
Added: svn:eol-style
+ native
This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.
|