-
Notifications
You must be signed in to change notification settings - Fork 0
/
VoxelBlock.c.orig
336 lines (270 loc) · 10.7 KB
/
VoxelBlock.c.orig
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
#include "VoxelBlock.h"
#include "DS3D/DS3D.h"
#include <stdlib.h>
#include <math.h>
#define PatternFlipXFlag 0x20
#define PatternFlipYFlag 0x40
#define PatternFlipDiagonalFlag 0x80
#define FullyLitPattern 0x3f
#define NoFacePattern 0x5f
#define NeedsRefreshPattern 0x7f
static uint8_t PatternTable[256]=
{
0x3f,0x85,0xa5,0x8f,0x05,0x10,0x30,0x9c,0x45,0x50,0x70,0xdc,0x0f,0x1c,0x3c,0x1f,
0x00,0x86,0xa7,0x91,0x06,0x10,0x32,0x9c,0x47,0xd2,0x73,0xdd,0x11,0x1c,0x3d,0x1f,
0x20,0x87,0xa6,0xb1,0x26,0x12,0x30,0x9c,0x67,0x53,0xf2,0xfd,0x31,0x1d,0x3c,0x1f,
0x01,0x89,0xa9,0x95,0x08,0x12,0x32,0x9c,0x4b,0xd8,0xf8,0xde,0x14,0x1d,0x3d,0x1f,
0x40,0xc6,0xe7,0xd1,0x07,0x92,0x33,0x9d,0x46,0x50,0x72,0xdc,0x51,0x1c,0x7d,0x1f,
0x81,0x88,0xab,0x94,0x09,0x92,0x38,0x9d,0x49,0xd2,0x78,0xdd,0x15,0x1c,0x3e,0x1f,
0x02,0x8a,0xea,0x96,0x0a,0x17,0x33,0x9d,0x6a,0x53,0x77,0xfd,0x16,0x1d,0x7d,0x1f,
0x03,0x8c,0xad,0x99,0x0c,0x17,0x38,0x9d,0x4d,0xd8,0x7a,0xde,0x19,0x1d,0x3e,0x1f,
0x60,0xc7,0xe6,0xf1,0x27,0x13,0xb2,0xbd,0x66,0x52,0x70,0xdc,0x71,0x5d,0x3c,0x1f,
0x22,0xca,0xaa,0xb6,0x2a,0x13,0x37,0xbd,0x4a,0x57,0x73,0xdd,0x36,0x5d,0x3d,0x1f,
0xa1,0x8b,0xa8,0xb4,0x29,0x18,0xb2,0xbd,0x69,0x58,0xf2,0xfd,0x35,0x1e,0x3c,0x1f,
0x23,0x8d,0xac,0xb9,0x2c,0x18,0x37,0xbd,0x6d,0x5a,0xf8,0xde,0x39,0x1e,0x3d,0x1f,
0x41,0xc9,0xe9,0xd5,0x0b,0x98,0xb8,0x9e,0x48,0x52,0x72,0xdc,0x54,0x5d,0x7d,0x1f,
0x43,0xcc,0xed,0xd9,0x0d,0x98,0x3a,0x9e,0x4c,0x57,0x78,0xdd,0x59,0x5d,0x3e,0x1f,
0x63,0xcd,0xec,0xf9,0x2d,0x1a,0xb8,0x9e,0x6c,0x58,0x77,0xfd,0x79,0x1e,0x7d,0x1f,
0x04,0x8e,0xae,0x9b,0x0e,0x1a,0x3a,0x9e,0x4e,0x5a,0x7a,0xde,0x1b,0x1e,0x3e,0x1f,
};
void InitVoxelBlock(VoxelBlock *self,int width,int height,int depth,uint16_t *voxels)
{
self->width=width;
self->height=height;
self->depth=depth;
self->voxels=malloc(width*height*depth*sizeof(self->voxels[0]));
if(voxels)
{
for(int i=0;i<width*height*depth;i++)
{
self->voxels[i].colour=voxels[i];
self->voxels[i].patterns[0]=NeedsRefreshPattern;
}
RefreshVoxelBlock(self);
}
else
{
for(int i=0;i<width*height*depth;i++)
{
self->voxels[i].colour=0;
for(int j=0;j<6;j++) self->voxels[i].patterns[j]=NoFacePattern;
}
}
}
void CleanupVoxelBlock(VoxelBlock *self)
{
free(self->voxels);
}
Voxel *VoxelStructAt(VoxelBlock *self,int x,int y,int z)
{
static Voxel emptyvoxel={0,NoFacePattern,NoFacePattern,NoFacePattern,NoFacePattern,NoFacePattern,NoFacePattern };
if(x<0) return &emptyvoxel;
if(y<0) return &emptyvoxel;
if(z<0) return &emptyvoxel;
if(x>=self->width) return &emptyvoxel;
if(y>=self->height) return &emptyvoxel;
if(z>=self->depth) return &emptyvoxel;
return &self->voxels[x+(y+z*self->height)*self->width];
}
void SetVoxelAt(VoxelBlock *self,int x,int y,int z,uint16_t val)
{
if(x<0) return;
if(y<0) return;
if(z<0) return;
if(x>=self->width) return;
if(y>=self->height) return;
if(z>=self->depth) return;
Voxel *voxel=&self->voxels[x+(y+z*self->height)*self->width];
voxel->colour=val;
voxel->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y+1,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y+1,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y+1,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y-1,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y-1,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x+1,y-1,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y+1,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y+1,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y+1,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y-1,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y-1,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y-1,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y+1,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y+1,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y+1,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y,z-1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y-1,z+1)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y-1,z)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x-1,y-1,z-1)->patterns[0]=NeedsRefreshPattern;
}
static uint32_t LightFunction(Vector lightdir,float nx,float ny,float nz);
static void DrawFace(int pattern,int fx,int fy,int fz,int dxdu,int dydu,int dzdu,int dxdv,int dydv,int dzdv);
void DrawVoxelBlock(VoxelBlock *self)
{
DSMatrixMode(DS_POSITION);
DSTranslatef32(-DSf32(self->width)/2,-DSf32(self->height)/2,-DSf32(self->depth)/2);
Matrix4x4 posmtx=DSGetPositionMatrix();
Matrix4x4 inverse=FastMatrixInverse4x4(posmtx);
Vector viewdir=MatrixOffset4x4(inverse);
Vector lightdir=TransformVector3x3(Matrix4x4To3x3(inverse),MakeVector(DSf32(-1),DSf32(1),DSf32(2)));
// Vector viewdir=MakeVector(DSf32(1),DSf32(1),DSf32(-1));
uint32_t light_x_pos=LightFunction(lightdir,1,0,0);
uint32_t light_x_neg=LightFunction(lightdir,-1,0,0);
uint32_t light_y_pos=LightFunction(lightdir,0,1,0);
uint32_t light_y_neg=LightFunction(lightdir,0,-1,0);
uint32_t light_z_pos=LightFunction(lightdir,0,0,1);
uint32_t light_z_neg=LightFunction(lightdir,0,0,-1);
DSMatrixMode(DS_POSITION);
DSScalef32(DSf32(4096),DSf32(4096),DSf32(4096));
DSPolygonAttributes(DS_POLY_MODE_MODULATION|DS_POLY_CULL_NONE|DS_POLY_LIGHT0|DS_POLY_ALPHA(31));
DSLight(0,0xffff,0x200);
DSBegin(DS_QUADS);
Voxel *voxel=self->voxels;
for(int z=0;z<self->depth;z++)
for(int y=0;y<self->height;y++)
for(int x=0;x<self->width;x++)
{
if(IsVoxelFilled(voxel->colour))
{
//DSColor(voxel->colour);
DSMaterialDiffuseAndAmbient(voxel->colour,0);
if(voxel->patterns[0]!=NoFacePattern && viewdir.x<DSinttof32(x))
{
DSNormal(light_x_neg);
DrawFace(voxel->patterns[0],x,y,z,0,1,0,0,0,1);
}
if(voxel->patterns[1]!=NoFacePattern && viewdir.x>DSinttof32(x+1))
{
DSNormal(light_x_pos);
DrawFace(voxel->patterns[1],x+1,y,z,0,1,0,0,0,1);
}
if(voxel->patterns[2]!=NoFacePattern && viewdir.y<DSinttof32(y))
{
DSNormal(light_y_neg);
DrawFace(voxel->patterns[2],x,y,z,0,0,1,1,0,0);
}
if(voxel->patterns[3]!=NoFacePattern && viewdir.y>DSinttof32(y+1))
{
DSNormal(light_y_pos);
DrawFace(voxel->patterns[3],x,y+1,z,0,0,1,1,0,0);
}
if(voxel->patterns[4]!=NoFacePattern && viewdir.z<DSinttof32(z))
{
DSNormal(light_z_neg);
DrawFace(voxel->patterns[4],x,y,z,1,0,0,0,1,0);
}
if(voxel->patterns[5]!=NoFacePattern && viewdir.z>DSinttof32(z+1))
{
DSNormal(light_z_pos);
DrawFace(voxel->patterns[5],x,y,z+1,1,0,0,0,1,0);
}
}
voxel++;
}
DSEnd();
}
static inline float TransformRange(float val,float oldlow,float oldhigh,float newlow,float newhigh)
{
return (val-oldlow)/(oldhigh-oldlow)*(newhigh-newlow)+newlow;
}
static inline float ClampRange(float val,float low,float high)
{
if(val<low) return low;
if(val>high) return high;
return val;
}
static uint32_t LightFunction(Vector lightdir,float nx,float ny,float nz)
{
float lx=lightdir.x;
float ly=lightdir.y;
float lz=lightdir.z;
float l=sqrt(lx*lx+ly*ly+lz*lz);
lx/=l; ly/=l; lz/=l;
float light=ClampRange(TransformRange(lx*nx+ly*ny+lz*nz,-0.5,1,0.5,1),0.5,1);
return ((int)(light*511))&0x3ff;
}
static void DrawFace(int pattern,int fx,int fy,int fz,int dxdu,int dydu,int dzdu,int dxdv,int dydv,int dzdv)
{
if(pattern!=FullyLitPattern)
{
int index=pattern&0x1f;
int16_t u1=0,v1=0,u2=DSt16(32),v2=DSt16(32);
if(pattern&PatternFlipXFlag) { u1=DSt16(32)-u1; u2=DSt16(32)-u2; }
if(pattern&PatternFlipYFlag) { v1=DSt16(32)-v1; v2=DSt16(32)-v2; }
DSSetTexture(DS_TEX_ADDRESS(index*32*32/2)|DS_TEX_SIZE_S_32|DS_TEX_SIZE_T_32|DS_TEX_FORMAT_PAL4);
if(pattern&PatternFlipDiagonalFlag)
{
DSTexCoord2t16(v1,u1); DSVertex3v16(fx,fy,fz);
DSTexCoord2t16(v1,u2); DSVertex3v16(fx+dxdu,fy+dydu,fz+dzdu);
DSTexCoord2t16(v2,u2); DSVertex3v16(fx+dxdu+dxdv,fy+dydu+dydv,fz+dzdu+dzdv);
DSTexCoord2t16(v2,u1); DSVertex3v16(fx+dxdv,fy+dydv,fz+dzdv);
}
else
{
DSTexCoord2t16(u1,v1); DSVertex3v16(fx,fy,fz);
DSTexCoord2t16(u2,v1); DSVertex3v16(fx+dxdu,fy+dydu,fz+dzdu);
DSTexCoord2t16(u2,v2); DSVertex3v16(fx+dxdu+dxdv,fy+dydu+dydv,fz+dzdu+dzdv);
DSTexCoord2t16(u1,v2); DSVertex3v16(fx+dxdv,fy+dydv,fz+dzdv);
}
}
else
{
DSSetTexture(0);
DSVertex3v16(fx,fy,fz);
DSVertex3v16(fx+dxdu,fy+dydu,fz+dzdu);
DSVertex3v16(fx+dxdu+dxdv,fy+dydu+dydv,fz+dzdu+dzdv);
DSVertex3v16(fx+dxdv,fy+dydv,fz+dzdv);
}
}
static int PickPattern(VoxelBlock *self,int x,int y,int z,int dxdu,int dydu,int dzdu,int dxdv,int dydv,int dzdv);
void RefreshVoxelBlock(VoxelBlock *self)
{
Voxel *voxel=self->voxels;
for(int z=0;z<self->depth;z++)
for(int y=0;y<self->height;y++)
for(int x=0;x<self->width;x++)
{
if(IsVoxelFilled(voxel->colour) && voxel->patterns[0]==NeedsRefreshPattern)
{
voxel->patterns[0]=PickPattern(self,x-1,y,z,0,1,0,0,0,1);
voxel->patterns[1]=PickPattern(self,x+1,y,z,0,1,0,0,0,1);
voxel->patterns[2]=PickPattern(self,x,y-1,z,0,0,1,1,0,0);
voxel->patterns[3]=PickPattern(self,x,y+1,z,0,0,1,1,0,0);
voxel->patterns[4]=PickPattern(self,x,y,z-1,1,0,0,0,1,0);
voxel->patterns[5]=PickPattern(self,x,y,z+1,1,0,0,0,1,0);
}
voxel++;
}
}
static int PickPattern(VoxelBlock *self,int x,int y,int z,
int dxdu,int dydu,int dzdu,int dxdv,int dydv,int dzdv)
{
if(IsVoxelFilledAt(self,x,y,z)) return NoFacePattern;
int pattern=0;
if(IsVoxelFilledAt(self,x+dxdu,y+dydu,z+dzdu)) pattern|=0x01;
if(IsVoxelFilledAt(self,x-dxdu,y-dydu,z-dzdu)) pattern|=0x02;
if(IsVoxelFilledAt(self,x+dxdv,y+dydv,z+dzdv)) pattern|=0x04;
if(IsVoxelFilledAt(self,x-dxdv,y-dydv,z-dzdv)) pattern|=0x08;
if(IsVoxelFilledAt(self,x+dxdu+dxdv,y+dydu+dydv,z+dzdu+dzdv)) pattern|=0x10;
if(IsVoxelFilledAt(self,x-dxdu+dxdv,y-dydu+dydv,z-dzdu+dzdv)) pattern|=0x20;
if(IsVoxelFilledAt(self,x+dxdu-dxdv,y+dydu-dydv,z+dzdu-dzdv)) pattern|=0x40;
if(IsVoxelFilledAt(self,x-dxdu-dxdv,y-dydu-dydv,z-dzdu-dzdv)) pattern|=0x80;
return PatternTable[pattern];
}
void ScrollVoxelBlockByZ(VoxelBlock *self)
{
memmove(&self->voxels[self->width*self->height],self->voxels,sizeof(Voxel)*self->width*self->height*(self->depth-1));
/* for(int y=0;y<self->height;y++)
for(int x=0;x<self->width;x++)
{
VoxelStructAt(self,x,y,0)->patterns[0]=NeedsRefreshPattern;
VoxelStructAt(self,x,y,1)->patterns[0]=NeedsRefreshPattern;
}*/
}