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
|
uniform sampler2D baseTexture;
uniform sampler2D normalTexture;
uniform sampler2D useNormalmap;
uniform vec4 skyBgColor;
uniform float fogDistance;
uniform vec3 eyePosition;
varying vec3 vPosition;
varying vec3 worldPosition;
varying float area_enable_parallax;
varying vec3 eyeVec;
varying vec3 tsEyeVec;
varying vec3 lightVec;
varying vec3 tsLightVec;
bool normalTexturePresent = false;
const float e = 2.718281828459;
const float BS = 10.0;
float intensity (vec3 color)
{
return (color.r + color.g + color.b) / 3.0;
}
float get_rgb_height (vec2 uv)
{
return intensity(texture2D(baseTexture,uv).rgb);
}
vec4 get_normal_map(vec2 uv)
{
vec4 bump = texture2D(normalTexture, uv).rgba;
bump.xyz = normalize(bump.xyz * 2.0 - 1.0);
return bump;
}
float find_intersection(vec2 dp, vec2 ds)
{
const float depth_step = 1.0 / 24.0;
float depth = 1.0;
for (int i = 0 ; i < 24 ; i++) {
float h = texture2D(normalTexture, dp + ds * depth).a;
if (h >= depth)
break;
depth -= depth_step;
}
return depth;
}
float find_intersectionRGB(vec2 dp, vec2 ds) {
const float depth_step = 1.0 / 24.0;
float depth = 1.0;
for (int i = 0 ; i < 24 ; i++) {
float h = get_rgb_height(dp + ds * depth);
if (h >= depth)
break;
depth -= depth_step;
}
return depth;
}
void main (void)
{
vec3 color;
vec4 bump;
vec2 uv = gl_TexCoord[0].st;
bool use_normalmap = false;
#if USE_NORMALMAPS == 1
if (texture2D(useNormalmap,vec2(1.0, 1.0)).r > 0.0) {
normalTexturePresent = true;
}
#endif
#ifdef ENABLE_PARALLAX_OCCLUSION
vec2 eyeRay = vec2 (tsEyeVec.x, -tsEyeVec.y);
const float scale = PARALLAX_OCCLUSION_SCALE / PARALLAX_OCCLUSION_ITERATIONS;
const float bias = PARALLAX_OCCLUSION_BIAS / PARALLAX_OCCLUSION_ITERATIONS;
#if PARALLAX_OCCLUSION_MODE == 0
// Parallax occlusion with slope information
if (normalTexturePresent && area_enable_parallax > 0.0) {
for (int i = 0; i < PARALLAX_OCCLUSION_ITERATIONS; i++) {
vec4 normal = texture2D(normalTexture, uv.xy);
float h = normal.a * scale - bias;
uv += h * normal.z * eyeRay;
}
#endif
#if PARALLAX_OCCLUSION_MODE == 1
// Relief mapping
if (normalTexturePresent && area_enable_parallax > 0.0) {
vec2 ds = eyeRay * PARALLAX_OCCLUSION_SCALE;
float dist = find_intersection(uv, ds);
uv += dist * ds;
#endif
} else if (GENERATE_NORMALMAPS == 1 && area_enable_parallax > 0.0) {
vec2 ds = eyeRay * PARALLAX_OCCLUSION_SCALE;
float dist = find_intersectionRGB(uv, ds);
uv += dist * ds;
}
#endif
#if USE_NORMALMAPS == 1
if (normalTexturePresent) {
bump = get_normal_map(uv);
use_normalmap = true;
}
#endif
if (GENERATE_NORMALMAPS == 1 && use_normalmap == false) {
float tl = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y + SAMPLE_STEP));
float t = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y - SAMPLE_STEP));
float tr = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y + SAMPLE_STEP));
float r = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y));
float br = get_rgb_height(vec2(uv.x + SAMPLE_STEP, uv.y - SAMPLE_STEP));
float b = get_rgb_height(vec2(uv.x, uv.y - SAMPLE_STEP));
float bl = get_rgb_height(vec2(uv.x -SAMPLE_STEP, uv.y - SAMPLE_STEP));
float l = get_rgb_height(vec2(uv.x - SAMPLE_STEP, uv.y));
float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
bump = vec4(normalize(vec3 (dX, dY, NORMALMAPS_STRENGTH)), 1.0);
use_normalmap = true;
}
vec4 base = texture2D(baseTexture, uv).rgba;
#ifdef ENABLE_BUMPMAPPING
if (use_normalmap) {
vec3 L = normalize(lightVec);
vec3 E = normalize(eyeVec);
float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0), 1.0);
float diffuse = dot(-E,bump.xyz);
color = (diffuse + 0.1 * specular) * base.rgb;
} else {
color = base.rgb;
}
#else
color = base.rgb;
#endif
#if MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE
float alpha = gl_Color.a;
vec4 col = vec4(color.rgb, alpha);
col *= gl_Color;
if (fogDistance != 0.0) {
float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
alpha = mix(alpha, 0.0, d);
}
gl_FragColor = vec4(col.rgb, alpha);
#else
vec4 col = vec4(color.rgb, base.a);
col *= gl_Color;
if (fogDistance != 0.0) {
float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
col = mix(col, skyBgColor, d);
}
gl_FragColor = vec4(col.rgb, base.a);
#endif
}
|
