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Normal maps generation on the fly.

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Parallax mapping with slope information.
Overriding normal maps.
This commit is contained in:
RealBadAngel 2014-03-21 01:32:00 +01:00
parent f3d83a4516
commit 0dc1aec509
16 changed files with 735 additions and 434 deletions
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149
client/shaders/liquids_shader/opengl_fragment.glsl
View file

@ -1,54 +1,95 @@
uniform sampler2D baseTexture;
uniform sampler2D normalTexture;
uniform sampler2D useNormalmap;
uniform vec4 skyBgColor;
uniform float fogDistance;
uniform vec3 eyePosition;
varying vec3 vPosition;
varying vec3 eyeVec;
const float e = 2.718281828459;
void main (void)
{
vec3 color;
vec2 uv = gl_TexCoord[0].st;
#ifdef USE_NORMALMAPS
float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
#endif
#ifdef ENABLE_BUMPMAPPING
if (use_normalmap > 0.0) {
vec3 base = texture2D(baseTexture, uv).rgb;
vec3 vVec = normalize(eyeVec);
vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
vec3 R = reflect(-vVec, bump);
vec3 lVec = normalize(vVec);
float diffuse = max(dot(vec3(-1.0, -0.4, 0.5), bump), 0.0);
float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);
color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;
} else {
color = texture2D(baseTexture, uv).rgb;
}
#else
color = texture2D(baseTexture, uv).rgb;
#endif
float alpha = gl_Color.a;
vec4 col = vec4(color.r, color.g, color.b, alpha);
col *= gl_Color;
col = col * col; // SRGB -> Linear
col *= 1.8;
col.r = 1.0 - exp(1.0 - col.r) / e;
col.g = 1.0 - exp(1.0 - col.g) / e;
col.b = 1.0 - exp(1.0 - col.b) / e;
col = sqrt(col); // Linear -> SRGB
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.r, col.g, col.b, alpha);
}
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 vec3 eyeVec;
varying vec3 tsEyeVec;
varying vec3 lightVec;
varying vec3 tsLightVec;
const float e = 2.718281828459;
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);
bump.y = -bump.y;
return bump;
}
void main (void)
{
vec3 color;
vec4 bump;
vec2 uv = gl_TexCoord[0].st;
bool use_normalmap = false;
#ifdef USE_NORMALMAPS
if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
bump = get_normal_map(uv);
use_normalmap = true;
}
#endif
#ifdef GENERATE_NORMALMAPS
if (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;
}
#endif
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),0.5);
float diffuse = dot(E,bump.xyz);
color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
} else {
color = base.rgb;
}
#else
color = base.rgb;
#endif
float alpha = gl_Color.a;
vec4 col = vec4(color.rgb, alpha);
col = col * col; // SRGB -> Linear
col *= 1.8;
col.r = 1.0 - exp(1.0 - col.r) / e;
col.g = 1.0 - exp(1.0 - col.g) / e;
col.b = 1.0 - exp(1.0 - col.b) / e;
col = sqrt(col); // Linear -> SRGB
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(color.rgb, alpha);
}

67
client/shaders/liquids_shader/opengl_vertex.glsl
View file

@ -1,40 +1,84 @@
uniform mat4 mWorldViewProj;
uniform mat4 mInvWorld;
uniform mat4 mTransWorld;
uniform mat4 mWorld;
uniform float dayNightRatio;
uniform float animationTimer;
uniform vec3 eyePosition;
varying vec3 vPosition;
varying vec3 worldPosition;
varying vec3 eyeVec;
varying vec3 lightVec;
varying vec3 tsEyeVec;
varying vec3 tsLightVec;
const float BS = 10.0;
void main(void)
{
gl_TexCoord[0] = gl_MultiTexCoord0;
#ifdef ENABLE_WAVING_WATER
vec4 pos2 = gl_Vertex;
pos2.y -= 2.0;
pos2.y -= sin (pos2.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) * WATER_WAVE_HEIGHT
+ sin ((pos2.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) / 7.0) * WATER_WAVE_HEIGHT;
gl_Position = mWorldViewProj * pos2;
vPosition = gl_Position.xyz;
#else
gl_Position = mWorldViewProj * gl_Vertex;
vPosition = gl_Position.xyz;
#endif
worldPosition = (mWorld * gl_Vertex).xyz;
vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
vec3 normal, tangent, binormal;
normal = normalize(gl_NormalMatrix * gl_Normal);
if (gl_Normal.x > 0.5) {
// 1.0, 0.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, -1.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
} else if (gl_Normal.x < -0.5) {
// -1.0, 0.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
} else if (gl_Normal.y > 0.5) {
// 0.0, 1.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
} else if (gl_Normal.y < -0.5) {
// 0.0, -1.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
} else if (gl_Normal.z > 0.5) {
// 0.0, 0.0, 1.0
tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
} else if (gl_Normal.z < -0.5) {
// 0.0, 0.0, -1.0
tangent = normalize(gl_NormalMatrix * vec3(-1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
}
mat3 tbnMatrix = mat3( tangent.x, binormal.x, normal.x,
tangent.y, binormal.y, normal.y,
tangent.z, binormal.z, normal.z);
lightVec = sunPosition - worldPosition;
tsLightVec = lightVec * tbnMatrix;
eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
vPosition = (mWorldViewProj * gl_Vertex).xyz;
tsEyeVec = eyeVec * tbnMatrix;
vec4 color;
//color = vec4(1.0, 1.0, 1.0, 1.0);
float day = gl_Color.r;
float night = gl_Color.g;
float light_source = gl_Color.b;
/*color.r = mix(night, day, dayNightRatio);
color.g = color.r;
color.b = color.r;*/
float rg = mix(night, day, dayNightRatio);
rg += light_source * 2.5; // Make light sources brighter
float b = rg;
@ -54,10 +98,13 @@ void main(void)
color.r = clamp(rg,0.0,1.0);
color.g = clamp(rg,0.0,1.0);
color.b = clamp(b,0.0,1.0);
// Make sides and bottom darker than the top
color = color * color; // SRGB -> Linear
if(gl_Normal.y <= 0.5)
color *= 0.6;
color = sqrt(color); // Linear -> SRGB
color.a = gl_Color.a;
gl_FrontColor = gl_BackColor = color;
gl_TexCoord[0] = gl_MultiTexCoord0;
}