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
|
/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma version(1)
#pragma rs java_package_name(com.example.android.rs.vr.engine)
#pragma rs_fp_relaxed
#define FLOAT_MAX 3.4028234E30f
float vert[3 * 8];
int index[3 * 12];
int width;
int height;
static float zoff[12];
static float2 slope[12];
static float2 p1[12];
static float2 p2[12];
static float2 p3[12];
float2 d12[12];
float2 d23[12];
float2 d31[12];
static int total;
static void
triangleSetup(float3 f1, float3 f2, float3 f3) {
if (((f1.x - f2.x) * (f3.y - f2.y) - (f1.y - f2.y) * (f3.x - f2.x)) < 0) {
float3 tmp = f1;
f1 = f2;
f2 = tmp;
}
// using maxmima
// string(solve([x1*dx+y1*dy+zoff=z1,x2*dx+y2*dy+zoff=z2,x3*dx+y3*dy+zoff=z3],[dx,dy,zoff]));
double d = (f1.x * (f3.y - f2.y) - f2.x * f3.y + f3.x * f2.y + (f2.x - f3.x)
* f1.y);
if (d == 0) {
return;
}
slope[total].x = (-(f1.y * (f3.z - f2.z) - f2.y * f3.z + f3.y * f2.z + (f2.y - f3.y) * f1.z)
/ d);
slope[total].y = ((f1.x * (f3.z - f2.z) - f2.x * f3.z + f3.x * f2.z + (f2.x - f3.x) * f1.z)
/ d);
zoff[total] = ((f1.x * (f3.y * f2.z - f2.y * f3.z) + f1.y * (f2.x * f3.z - f3.x * f2.z) +
(f3.x * f2.y - f2.x * f3.y) * f1.z) / d);
p1[total] = f1.xy;
p2[total] = f2.xy;
p3[total] = f3.xy;
d12[total] = p1[total] - p2[total];
d23[total] = p2[total] - p3[total];
d31[total] = p3[total] - p1[total];
total++;
}
void setup_triangles(int w, int h) {
width = w;
height = h;
total = 0;
// rsDebug("RRRRR >>>>>> setup_triangles ", w, h);
float3 f1;
float3 f2;
float3 f3;
for (int i = 0; i < 3 * 12; i += 3) {
int p1 = index[i];
int p2 = index[i + 1];
int p3 = index[i + 2];
f1.x = vert[p1];
f1.y = vert[p1 + 1];
f1.z = vert[p1 + 2];
f2.x = vert[p2];
f2.y = vert[p2 + 1];
f2.z = vert[p2 + 2];
f3.x = vert[p3];
f3.y = vert[p3 + 1];
f3.z = vert[p3 + 2];
triangleSetup(f1, f2, f3);
}
}
float2 __attribute__ ((kernel)) render_z(uint32_t x, uint32_t y) {
float2 out = (float2) {FLOAT_MAX,-FLOAT_MAX};
float2 loc;
loc.x = x;
loc.y = y;
for (int i = 0; i < total; i++) {
float2 d1 = loc - p1[i];
float2 d2 = loc - p2[i];
float2 d3 = loc - p3[i];
float test1 = (d12[i].x) * (d1.y) - (d12[i].y) * (d1.x);
float test2 = (d23[i].x) * (d2.y) - (d23[i].y) * (d2.x);
float test3 = (d31[i].x) * (d3.y) - (d31[i].y) * (d3.x);
// float test = edge(0 , test1) * edge(0 , test2)* edge(0 , test3);
if (test1 >= 0 &&
test2 >= 0 &&
test3 >= 0) {
float2 delta = slope[i] * loc;
float z = zoff[i] + delta.x + delta.y;
out.x = min(z, out.x);
out.y = max(z, out.y);
}
}
return out;
}
rs_allocation z_range_buff;
float min_z = 1500;
float max_z = 2300;
void getMinMax() {
float tmp_min = FLOAT_MAX;
float tmp_max = -FLOAT_MAX;;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
float2 v = rsGetElementAt_float2(z_range_buff, x, y);
if (v.x == FLOAT_MAX) {
continue;
}
tmp_min = min(tmp_min, v.x);
tmp_max = max(tmp_max, v.x);
}
}
min_z = tmp_min;
max_z = tmp_max;
rsDebug("RRRRR >>>>>> getMinMax ", min_z, max_z);
}
uchar4 __attribute__ ((kernel)) draw_z_buffer(float2 in) {
if (in.x != FLOAT_MAX) {
uchar v = (uchar)(255 * (in.x - min_z) / (max_z - min_z));
uchar4 out;
out.r = v;
out.g = v;
out.b = v;
out.a = 255;
return out;
}
uchar4 out;
out.r = 0x44;
out.g = 0x44;
out.b = 0x99;
out.a = 255;
return out;
}
|
