mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-15 09:21:33 +00:00
c1c77bd64a
This is for developing methods of implementing geometric algebra and eventually playing with it visually.
111 lines
2.4 KiB
R
111 lines
2.4 KiB
R
#include <stdlib.h>
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#include <Set.h>
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#include "basisblade.h"
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#include "basisgroup.h"
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#include "basislayout.h"
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#include "util.h"
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@implementation BasisLayout
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+(BasisLayout *) new:(int) count groups:(BasisGroup **)groups
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{
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BasisLayout *layout = [[[BasisLayout alloc] init] autorelease];
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layout.count = count;
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layout.groups = obj_malloc (count * sizeof (BasisGroup *));
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layout.set = [[Set set] retain];
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layout.range = { ~0u, 0 };
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int *group_base = obj_malloc ((count + 1) * sizeof (int));
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group_base[0] = 0;
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int num_blades = 0;
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for (int i = 0; i < count; i++) {
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layout.groups[i] = [groups[i] retain];
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[layout.set union:[groups[i] set]];
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group_base[i + 1] = [groups[i] count];
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num_blades += group_base[i + 1];
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uivec2 r = [groups[i] blade_range];
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if (r[0] < layout.range[0]) {
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layout.range[0] = r[0];
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}
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if (r[1] > layout.range[1]) {
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layout.range[1] = r[1];
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}
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}
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prefixsum (group_base, count);
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layout.blade_count = num_blades;
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layout.group_map = obj_malloc (num_blades * sizeof (ivec3));
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int num = layout.range[1] - layout.range[0] + 1;
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layout.mask_map = obj_malloc (num * sizeof (int));
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int *group_inds = obj_malloc ((count + 1) * sizeof (int));
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for (int i = 0; i < count; i++) {
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BasisGroup *g = groups[i];
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group_inds[i] = 0;
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for (int j = 0; j < [g count]; j++) {
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BasisBlade *b = [g bladeAt:j];
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layout.mask_map[[b mask] - layout.range[0]] = group_inds[count];
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layout.group_map[group_inds[count]][0] = i;
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layout.group_map[group_inds[count]][1] = group_inds[i]++;
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layout.group_map[group_inds[count]][2] = group_base[i];
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group_inds[count]++;
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}
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}
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obj_free (group_inds);
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return layout;
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}
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-(void)dealloc
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{
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[set release];
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for (int i = 0; i < count; i++) {
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[groups[i] release];
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}
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obj_free (groups);
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obj_free (group_map);
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[super dealloc];
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}
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-(int)count
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{
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return count;
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}
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-(int)num_components
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{
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int num_components = 0;
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// assumes there is no overlap
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for (int i = 0; i < count; i++) {
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num_components += [groups[i] count];
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}
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return num_components;
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}
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-(int)blade_count
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{
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return blade_count;
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}
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-(BasisGroup *) group:(int) ind
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{
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return groups[ind];
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}
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-(BasisBlade *) bladeAt:(int) ind
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{
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ivec3 gm = group_map[ind];
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BasisGroup *g = groups[gm[0]];
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return [g bladeAt:ind - gm[2]];
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}
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-(int) bladeIndex:(unsigned) mask
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{
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if (![set is_member:mask]) {
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return 0;
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}
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return mask_map[mask - range[0]];
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}
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-(Set *) set
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{
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return set;
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}
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@end
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