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
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
|
/* SPDX-License-Identifier: Apache-2.0
* Copyright 2021-2022 Blender Foundation */
/* MetalRT implementation of ray-scene intersection. */
#pragma once
#include "kernel/bvh/types.h"
#include "kernel/bvh/util.h"
CCL_NAMESPACE_BEGIN
/* Payload types. */
struct MetalRTIntersectionPayload {
RaySelfPrimitives self;
uint visibility;
float u, v;
int prim;
int type;
#if defined(__METALRT_MOTION__)
float time;
#endif
};
struct MetalRTIntersectionLocalPayload {
RaySelfPrimitives self;
uint local_object;
uint lcg_state;
short max_hits;
bool has_lcg_state;
bool result;
LocalIntersection local_isect;
};
struct MetalRTIntersectionShadowPayload {
RaySelfPrimitives self;
uint visibility;
#if defined(__METALRT_MOTION__)
float time;
#endif
int state;
float throughput;
short max_hits;
short num_hits;
short num_recorded_hits;
bool result;
};
/* Scene intersection. */
ccl_device_intersect bool scene_intersect(KernelGlobals kg,
ccl_private const Ray *ray,
const uint visibility,
ccl_private Intersection *isect)
{
if (!intersection_ray_valid(ray)) {
isect->t = ray->tmax;
isect->type = PRIMITIVE_NONE;
return false;
}
#if defined(__KERNEL_DEBUG__)
if (is_null_instance_acceleration_structure(metal_ancillaries->accel_struct)) {
isect->t = ray->tmax;
isect->type = PRIMITIVE_NONE;
kernel_assert(!"Invalid metal_ancillaries->accel_struct pointer");
return false;
}
if (is_null_intersection_function_table(metal_ancillaries->ift_default)) {
isect->t = ray->tmax;
isect->type = PRIMITIVE_NONE;
kernel_assert(!"Invalid ift_default");
return false;
}
#endif
metal::raytracing::ray r(ray->P, ray->D, ray->tmin, ray->tmax);
metalrt_intersector_type metalrt_intersect;
if (!kernel_data.bvh.have_curves) {
metalrt_intersect.assume_geometry_type(metal::raytracing::geometry_type::triangle);
}
MetalRTIntersectionPayload payload;
payload.self = ray->self;
payload.u = 0.0f;
payload.v = 0.0f;
payload.visibility = visibility;
typename metalrt_intersector_type::result_type intersection;
uint ray_mask = visibility & 0xFF;
if (0 == ray_mask && (visibility & ~0xFF) != 0) {
ray_mask = 0xFF;
/* No further intersector setup required: Default MetalRT behavior is any-hit. */
}
else if (visibility & PATH_RAY_SHADOW_OPAQUE) {
/* No further intersector setup required: Shadow ray early termination is controlled by the
* intersection handler */
}
#if defined(__METALRT_MOTION__)
payload.time = ray->time;
intersection = metalrt_intersect.intersect(r,
metal_ancillaries->accel_struct,
ray_mask,
ray->time,
metal_ancillaries->ift_default,
payload);
#else
intersection = metalrt_intersect.intersect(
r, metal_ancillaries->accel_struct, ray_mask, metal_ancillaries->ift_default, payload);
#endif
if (intersection.type == intersection_type::none) {
isect->t = ray->tmax;
isect->type = PRIMITIVE_NONE;
return false;
}
isect->t = intersection.distance;
isect->prim = payload.prim;
isect->type = payload.type;
isect->object = intersection.user_instance_id;
isect->t = intersection.distance;
if (intersection.type == intersection_type::triangle) {
isect->u = intersection.triangle_barycentric_coord.x;
isect->v = intersection.triangle_barycentric_coord.y;
}
else {
isect->u = payload.u;
isect->v = payload.v;
}
return isect->type != PRIMITIVE_NONE;
}
#ifdef __BVH_LOCAL__
ccl_device_intersect bool scene_intersect_local(KernelGlobals kg,
ccl_private const Ray *ray,
ccl_private LocalIntersection *local_isect,
int local_object,
ccl_private uint *lcg_state,
int max_hits)
{
if (!intersection_ray_valid(ray)) {
if (local_isect) {
local_isect->num_hits = 0;
}
return false;
}
# if defined(__KERNEL_DEBUG__)
if (is_null_instance_acceleration_structure(metal_ancillaries->accel_struct)) {
if (local_isect) {
local_isect->num_hits = 0;
}
kernel_assert(!"Invalid metal_ancillaries->accel_struct pointer");
return false;
}
if (is_null_intersection_function_table(metal_ancillaries->ift_local)) {
if (local_isect) {
local_isect->num_hits = 0;
}
kernel_assert(!"Invalid ift_local");
return false;
}
# endif
metal::raytracing::ray r(ray->P, ray->D, ray->tmin, ray->tmax);
metalrt_intersector_type metalrt_intersect;
metalrt_intersect.force_opacity(metal::raytracing::forced_opacity::non_opaque);
if (!kernel_data.bvh.have_curves) {
metalrt_intersect.assume_geometry_type(metal::raytracing::geometry_type::triangle);
}
MetalRTIntersectionLocalPayload payload;
payload.self = ray->self;
payload.local_object = local_object;
payload.max_hits = max_hits;
payload.local_isect.num_hits = 0;
if (lcg_state) {
payload.has_lcg_state = true;
payload.lcg_state = *lcg_state;
}
payload.result = false;
typename metalrt_intersector_type::result_type intersection;
# if defined(__METALRT_MOTION__)
intersection = metalrt_intersect.intersect(
r, metal_ancillaries->accel_struct, 0xFF, ray->time, metal_ancillaries->ift_local, payload);
# else
intersection = metalrt_intersect.intersect(
r, metal_ancillaries->accel_struct, 0xFF, metal_ancillaries->ift_local, payload);
# endif
if (lcg_state) {
*lcg_state = payload.lcg_state;
}
*local_isect = payload.local_isect;
return payload.result;
}
#endif
#ifdef __SHADOW_RECORD_ALL__
ccl_device_intersect bool scene_intersect_shadow_all(KernelGlobals kg,
IntegratorShadowState state,
ccl_private const Ray *ray,
uint visibility,
uint max_hits,
ccl_private uint *num_recorded_hits,
ccl_private float *throughput)
{
if (!intersection_ray_valid(ray)) {
return false;
}
# if defined(__KERNEL_DEBUG__)
if (is_null_instance_acceleration_structure(metal_ancillaries->accel_struct)) {
kernel_assert(!"Invalid metal_ancillaries->accel_struct pointer");
return false;
}
if (is_null_intersection_function_table(metal_ancillaries->ift_shadow)) {
kernel_assert(!"Invalid ift_shadow");
return false;
}
# endif
metal::raytracing::ray r(ray->P, ray->D, ray->tmin, ray->tmax);
metalrt_intersector_type metalrt_intersect;
metalrt_intersect.force_opacity(metal::raytracing::forced_opacity::non_opaque);
if (!kernel_data.bvh.have_curves) {
metalrt_intersect.assume_geometry_type(metal::raytracing::geometry_type::triangle);
}
MetalRTIntersectionShadowPayload payload;
payload.self = ray->self;
payload.visibility = visibility;
payload.max_hits = max_hits;
payload.num_hits = 0;
payload.num_recorded_hits = 0;
payload.throughput = 1.0f;
payload.result = false;
payload.state = state;
uint ray_mask = visibility & 0xFF;
if (0 == ray_mask && (visibility & ~0xFF) != 0) {
ray_mask = 0xFF;
}
typename metalrt_intersector_type::result_type intersection;
# if defined(__METALRT_MOTION__)
payload.time = ray->time;
intersection = metalrt_intersect.intersect(r,
metal_ancillaries->accel_struct,
ray_mask,
ray->time,
metal_ancillaries->ift_shadow,
payload);
# else
intersection = metalrt_intersect.intersect(
r, metal_ancillaries->accel_struct, ray_mask, metal_ancillaries->ift_shadow, payload);
# endif
*num_recorded_hits = payload.num_recorded_hits;
*throughput = payload.throughput;
return payload.result;
}
#endif
#ifdef __VOLUME__
ccl_device_intersect bool scene_intersect_volume(KernelGlobals kg,
ccl_private const Ray *ray,
ccl_private Intersection *isect,
const uint visibility)
{
if (!intersection_ray_valid(ray)) {
return false;
}
# if defined(__KERNEL_DEBUG__)
if (is_null_instance_acceleration_structure(metal_ancillaries->accel_struct)) {
kernel_assert(!"Invalid metal_ancillaries->accel_struct pointer");
return false;
}
if (is_null_intersection_function_table(metal_ancillaries->ift_default)) {
kernel_assert(!"Invalid ift_default");
return false;
}
# endif
metal::raytracing::ray r(ray->P, ray->D, ray->tmin, ray->tmax);
metalrt_intersector_type metalrt_intersect;
metalrt_intersect.force_opacity(metal::raytracing::forced_opacity::non_opaque);
if (!kernel_data.bvh.have_curves) {
metalrt_intersect.assume_geometry_type(metal::raytracing::geometry_type::triangle);
}
MetalRTIntersectionPayload payload;
payload.self = ray->self;
payload.visibility = visibility;
typename metalrt_intersector_type::result_type intersection;
uint ray_mask = visibility & 0xFF;
if (0 == ray_mask && (visibility & ~0xFF) != 0) {
ray_mask = 0xFF;
}
# if defined(__METALRT_MOTION__)
payload.time = ray->time;
intersection = metalrt_intersect.intersect(r,
metal_ancillaries->accel_struct,
ray_mask,
ray->time,
metal_ancillaries->ift_default,
payload);
# else
intersection = metalrt_intersect.intersect(
r, metal_ancillaries->accel_struct, ray_mask, metal_ancillaries->ift_default, payload);
# endif
if (intersection.type == intersection_type::none) {
return false;
}
isect->prim = payload.prim;
isect->type = payload.type;
isect->object = intersection.user_instance_id;
isect->t = intersection.distance;
if (intersection.type == intersection_type::triangle) {
isect->u = intersection.triangle_barycentric_coord.x;
isect->v = intersection.triangle_barycentric_coord.y;
}
else {
isect->u = payload.u;
isect->v = payload.v;
}
return isect->type != PRIMITIVE_NONE;
}
#endif
CCL_NAMESPACE_END
|
