88 lines
2.3 KiB
GLSL
88 lines
2.3 KiB
GLSL
/*
|
|
Copyright (c) 2013 yvt
|
|
|
|
This file is part of OpenSpades.
|
|
|
|
OpenSpades is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
OpenSpades is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with OpenSpades. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
|
|
|
|
uniform mat4 projectionViewMatrix;
|
|
uniform mat4 modelMatrix;
|
|
uniform mat4 viewModelMatrix;
|
|
uniform vec3 viewOrigin;
|
|
uniform float fogDistance;
|
|
|
|
// [x, y]
|
|
attribute vec2 positionAttribute;
|
|
|
|
varying vec3 fogDensity;
|
|
varying vec3 screenPosition;
|
|
varying vec3 viewPosition;
|
|
varying vec3 worldPosition;
|
|
|
|
uniform sampler2D waveTexture1;
|
|
uniform sampler2D waveTexture2;
|
|
uniform sampler2D waveTexture3;
|
|
|
|
void PrepareForShadow(vec3 worldOrigin, vec3 normal);
|
|
|
|
float DisplaceWater(vec2 worldPos){
|
|
|
|
vec4 waveCoord = worldPos.xyxy * vec4(vec2(0.08), vec2(0.15704))
|
|
+ vec4(0., 0., 0.754, 0.1315);
|
|
|
|
vec2 waveCoord2 = worldPos.xy * 0.02344 + vec2(.154, .7315);
|
|
|
|
|
|
vec4 wave = texture2DLod(waveTexture1, waveCoord.xy, 1.).xyzw;
|
|
float disp = mix(-0.1, 0.1, wave.w) * 1.;
|
|
|
|
vec4 wave2 = texture2DLod(waveTexture2, waveCoord.zw, 2.).xyzw;
|
|
disp += mix(-0.1, 0.1, wave2.w) * 0.5;
|
|
|
|
wave2 = texture2DLod(waveTexture3, waveCoord2.xy, 0.).xyzw;
|
|
disp += mix(-0.1, 0.1, wave2.w) * 2.5;
|
|
|
|
return disp * 4.;
|
|
}
|
|
|
|
void main() {
|
|
|
|
vec4 vertexPos = vec4(positionAttribute.xy, 0., 1.);
|
|
|
|
worldPosition = (modelMatrix * vertexPos).xyz;
|
|
|
|
worldPosition.z += DisplaceWater(worldPosition.xy);
|
|
|
|
gl_Position = projectionViewMatrix * vec4(worldPosition, 1.);
|
|
screenPosition = gl_Position.xyw;
|
|
screenPosition.xy = (screenPosition.xy + screenPosition.z) * .5;
|
|
|
|
vec4 viewPos = viewModelMatrix * vertexPos;
|
|
float distance = length(viewPos.xyz) / fogDistance;
|
|
distance = clamp(distance, 0., 1.);
|
|
fogDensity = vec3(distance);
|
|
fogDensity = pow(fogDensity, vec3(1., .9, .7));
|
|
fogDensity *= fogDensity;
|
|
|
|
viewPosition = viewPos.xyz;
|
|
|
|
|
|
PrepareForShadow((modelMatrix * vertexPos).xyz, vec3(0., 0., -1.));
|
|
}
|
|
|