-
Notifications
You must be signed in to change notification settings - Fork 3
/
wl_atmos.cpp
187 lines (165 loc) · 5.55 KB
/
wl_atmos.cpp
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
#include "version.h"
#if defined(USE_STARSKY) || defined(USE_RAIN) || defined(USE_SNOW)
#include "wl_def.h"
#if defined(USE_RAIN) || defined(USE_SNOW)
uint32_t rainpos = 0;
#endif
typedef struct {
int32_t x, y, z;
} point3d_t;
#define MAXPOINTS 400
point3d_t points[MAXPOINTS];
byte moon[100]={
0, 0, 27, 18, 15, 16, 19, 29, 0, 0,
0, 22, 16, 15, 15, 16, 16, 18, 24, 0,
27, 17, 15, 17, 16, 16, 17, 17, 18, 29,
18, 15, 15, 15, 16, 16, 17, 17, 18, 20,
16, 15, 15, 16, 16, 17, 17, 18, 19, 21,
16, 15, 17, 20, 18, 17, 18, 18, 20, 22,
19, 16, 18, 19, 17, 17, 18, 19, 22, 24,
28, 19, 17, 17, 17, 18, 19, 21, 25, 31,
0, 23, 18, 19, 18, 20, 22, 24, 28, 0,
0, 0, 28, 21, 20, 22, 28, 30, 0, 0 };
void Init3DPoints()
{
int hvheight = viewheight >> 1;
for(int i = 0; i < MAXPOINTS; i++)
{
point3d_t *pt = &points[i];
pt->x = 16384 - (rand() & 32767);
pt->z = 16384 - (rand() & 32767);
float len = sqrt((float)pt->x * pt->x + (float)pt->z * pt->z);
int j=50;
do
{
pt->y = 1024 + (rand() & 8191);
j--;
}
while(j > 0 && (float)pt->y * 256.F / len >= hvheight);
}
}
#endif
#ifdef USE_STARSKY
void DrawStarSky(byte *vbuf, uint32_t vbufPitch)
{
int hvheight = viewheight >> 1;
int hvwidth = viewwidth >> 1;
byte *ptr = vbuf;
for(int i = 0; i < hvheight; i++, ptr += vbufPitch)
memset(ptr, 0, viewwidth);
for(int i = 0; i < MAXPOINTS; i++)
{
point3d_t *pt = &points[i];
int32_t x = pt->x * viewcos + pt->z * viewsin;
int32_t y = pt->y << 16;
int32_t z = (pt->z * viewcos - pt->x * viewsin) >> 8;
if(z <= 0) continue;
int shade = z >> 18;
if(shade > 15) continue;
int32_t xx = x / z + hvwidth;
int32_t yy = hvheight - y / z;
if(xx >= 0 && xx < viewwidth && yy >= 0 && yy < hvheight)
vbuf[yy * vbufPitch + xx] = shade + 15;
}
int32_t x = 16384 * viewcos + 16384 * viewsin;
int32_t z = (16384 * viewcos - 16384 * viewsin) >> 8;
if(z <= 0) return;
int32_t xx = x / z + hvwidth;
int32_t yy = hvheight - ((hvheight - (hvheight >> 3)) << 22) / z;
if(xx > -10 && xx < viewwidth)
{
int stop = 10;
int i = 0;
if(xx < 0) i = -xx;
if(xx > viewwidth - 11) stop = viewwidth - xx;
for(; i < stop; i++)
for(int j = 0; j < 10; j++)
vbuf[(yy + j) * vbufPitch + xx + i] = moon[j * 10 + i];
}
}
#endif
#ifdef USE_RAIN
void DrawRain(byte *vbuf, uint32_t vbufPitch)
{
fixed px = (player->y + FixedMul(0x7900, viewsin)) >> 6;
fixed pz = (player->x - FixedMul(0x7900, viewcos)) >> 6;
int32_t ax, az, x, y, z, xx, yy, height, actheight;
int shade;
int hvheight = viewheight >> 1;
int hvwidth = viewwidth >> 1;
rainpos -= 1800; // TODO: make it tics dependent
for(int i = 0; i < MAXPOINTS; i++)
{
point3d_t *pt = &points[i];
ax = pt->x + px;
ax = 0x1fff - (ax & 0x3fff);
az = pt->z + pz;
az = 0x1fff - (az & 0x3fff);
x = ax * viewcos + az * viewsin;
y = -(heightnumerator << 7) + ((((pt->y << 6) + rainpos) & 0x0ffff) << 11);
z = (az * viewcos - ax * viewsin) >> 8;
if(z <= 0) continue;
shade = z >> 17;
if(shade > 13) continue;
xx = x / z + hvwidth;
if(xx < 0 || xx >= viewwidth) continue;
actheight = y / z;
yy = hvheight - actheight;
height = (heightnumerator << 10) / z;
if(actheight < 0) actheight = -actheight;
if(actheight < (wallheight[xx] >> 3) && height < wallheight[xx]) continue;
if(xx >= 0 && xx < viewwidth && yy > 0 && yy < viewheight)
{
vbuf[yy * vbufPitch + xx] = shade+15;
vbuf[(yy - 1) * vbufPitch + xx] = shade+16;
if(yy > 2)
vbuf[(yy - 2) * vbufPitch + xx] = shade+17;
}
}
}
#endif
#ifdef USE_SNOW
void DrawSnow(byte *vbuf, uint32_t vbufPitch)
{
fixed px = (player->y + FixedMul(0x7900, viewsin)) >> 6;
fixed pz = (player->x - FixedMul(0x7900, viewcos)) >> 6;
int32_t ax, az, x, y, z, xx, yy, height, actheight;
int shade;
int hvheight = viewheight >> 1;
int hvwidth = viewwidth >> 1;
rainpos -= 512; // TODO: make it tics dependent
for(int i = 0; i < MAXPOINTS; i++)
{
point3d_t *pt = &points[i];
ax = pt->x + px;
ax = 0x1fff - (ax & 0x3fff);
az = pt->z + pz;
az = 0x1fff - (az & 0x3fff);
x = ax * viewcos + az * viewsin;
y = -(heightnumerator << 7) + ((((pt->y << 6) + rainpos) & 0x0ffff) << 11);
z = (az * viewcos - ax * viewsin) >> 8;
if(z <= 0) continue;
shade = z >> 17;
if(shade > 13) continue;
xx = x / z + hvwidth;
if(xx < 0 || xx >= viewwidth) continue;
actheight = y / z;
yy = hvheight - actheight;
height = (heightnumerator << 10) / z;
if(actheight < 0) actheight = -actheight;
if(actheight < (wallheight[xx] >> 3) && height < wallheight[xx]) continue;
if(xx > 0 && xx < viewwidth && yy > 0 && yy < viewheight)
{
if(shade < 10)
{
vbuf[yy * vbufPitch + xx] = shade+17;
vbuf[yy * vbufPitch + xx - 1] = shade+16;
vbuf[(yy - 1) * vbufPitch + xx] = shade+16;
vbuf[(yy - 1) * vbufPitch + xx - 1] = shade+15;
}
else
vbuf[yy * vbufPitch + xx] = shade+15;
}
}
}
#endif