67 lines
2.4 KiB
GLSL
67 lines
2.4 KiB
GLSL
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#version 330 core
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layout(location = 0) out vec4 out_gbuffer0;
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layout(location = 1) out vec4 out_gbuffer1;
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in VS_OUT {
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vec2 water_texcoord;
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vec2 topo_texcoord;
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vec3 vertex_normal;
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vec3 view_vector;
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} fs_in;
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uniform sampler2D perlin_normalmap;
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uniform sampler2D water_dudvmap;
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uniform sampler2D water_normalmap;
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uniform sampler2D water_colormap;
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uniform float osg_SimulationTime;
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const vec2 sca = vec2(0.005);
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const vec2 sca2 = vec2(0.02);
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const vec2 tscale = vec2(0.25);
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const float scale = 5.0;
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const float mix_factor = 0.5;
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// normal_encoding.glsl
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vec2 encode_normal(vec3 n);
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// color.glsl
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vec3 eotf_inverse_sRGB(vec3 srgb);
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// normalmap.glsl
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mat3 cotangent_frame(vec3 N, vec3 p, vec2 uv);
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void get_rotation_matrix(float angle, out mat2 rotmat)
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{
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rotmat = mat2(cos(angle), -sin(angle),
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sin(angle), cos(angle));
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}
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void main()
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{
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vec2 disdis = texture(water_dudvmap, vec2(fs_in.water_texcoord * tscale) * scale).rg * 2.0 - 1.0;
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vec3 N0 = vec3(texture(water_normalmap, vec2(fs_in.water_texcoord + disdis * sca2) * scale) * 2.0 - 1.0);
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vec3 N1 = vec3(texture(perlin_normalmap, vec2(fs_in.water_texcoord + disdis * sca) * scale) * 2.0 - 1.0);
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N0 += vec3(texture(water_normalmap, vec2(fs_in.water_texcoord * tscale) * scale) * 2.0 - 1.0);
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N1 += vec3(texture(perlin_normalmap, vec2(fs_in.water_texcoord * tscale) * scale) * 2.0 - 1.0);
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mat2 rotmatrix;
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get_rotation_matrix(radians(2.0 * sin(osg_SimulationTime * 0.005)), rotmatrix);
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N0 += vec3(texture(water_normalmap, vec2(fs_in.water_texcoord * rotmatrix * (tscale + sca2)) * scale) * 2.0 - 1.0);
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N1 += vec3(texture(perlin_normalmap, vec2(fs_in.water_texcoord * rotmatrix * (tscale + sca2)) * scale) * 2.0 - 1.0);
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get_rotation_matrix(radians(-4.0 * sin(osg_SimulationTime * 0.003)), rotmatrix);
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N0 += vec3(texture(water_normalmap, vec2(fs_in.water_texcoord * rotmatrix + disdis * sca2) * scale) * 2.0 - 1.0);
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N1 += vec3(texture(perlin_normalmap, vec2(fs_in.water_texcoord * rotmatrix + disdis * sca) * scale) * 2.0 - 1.0);
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vec3 N = normalize(mix(N0, N1, mix_factor));
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mat3 TBN = cotangent_frame(fs_in.vertex_normal, fs_in.view_vector, fs_in.water_texcoord);
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N = normalize(TBN * N);
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vec3 floor_color = eotf_inverse_sRGB(texture(water_colormap, fs_in.topo_texcoord).rgb);
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out_gbuffer0.rg = encode_normal(N);
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out_gbuffer1.rgb = floor_color;
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}
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