diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred')
7 files changed, 232 insertions, 67 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl index 01543732d0..3ea2248bec 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl @@ -487,6 +487,43 @@ vec3 pbrPunctual(vec3 diffuseColor, vec3 specularColor, return clamp(color, vec3(0), vec3(10)); } +vec3 pbrCalcPointLightOrSpotLight(vec3 diffuseColor, vec3 specularColor, + float perceptualRoughness, + float metallic, + vec3 n, // normal + vec3 p, // pixel position + vec3 v, // view vector (negative normalized pixel position) + vec3 lp, // light position + vec3 ld, // light direction (for spotlights) + vec3 lightColor, + float lightSize, float falloff, float is_pointlight, float ambiance) +{ + vec3 color = vec3(0,0,0); + + vec3 lv = lp.xyz - p; + + float lightDist = length(lv); + + float dist = lightDist / lightSize; + if (dist <= 1.0) + { + lv /= lightDist; + + float dist_atten = calcLegacyDistanceAttenuation(dist, falloff); + + // spotlight coefficient. + float spot = max(dot(-ld, lv), is_pointlight); + // spot*spot => GL_SPOT_EXPONENT=2 + float spot_atten = spot*spot; + + vec3 intensity = spot_atten * dist_atten * lightColor * 3.0; //magic number to balance with legacy materials + + color = intensity*pbrPunctual(diffuseColor, specularColor, perceptualRoughness, metallic, n.xyz, v, lv); + } + + return color; +} + void calcDiffuseSpecular(vec3 baseColor, float metallic, inout vec3 diffuseColor, inout vec3 specularColor) { vec3 f0 = vec3(0.04); diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbralphaV.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbralphaV.glsl index d0fc362db9..ae179d3f37 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/pbralphaV.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/pbralphaV.glsl @@ -51,8 +51,6 @@ uniform vec4[2] texture_emissive_transform; out vec3 vary_fragcoord; -uniform float near_clip; - in vec3 position; in vec4 diffuse_color; in vec3 normal; @@ -88,7 +86,7 @@ void main() #endif gl_Position = vert; - vary_fragcoord.xyz = vert.xyz + vec3(0,0,near_clip); + vary_fragcoord.xyz = vert.xyz; base_color_texcoord = texture_transform(texcoord0, texture_base_color_transform, texture_matrix0); normal_texcoord = texture_transform(texcoord0, texture_normal_transform, texture_matrix0); diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl index 0de2d348c3..c4c1fc6952 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl @@ -31,7 +31,7 @@ #define TERRAIN_PBR_DETAIL_METALLIC_ROUGHNESS -3 #if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 -#define TerrainCoord vec4[2] +#define TerrainCoord vec4[3] #elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 #define TerrainCoord vec2 #endif @@ -131,12 +131,16 @@ uniform vec3[4] emissiveColors; uniform vec4 minimum_alphas; // PBR alphaMode: MASK, See: mAlphaCutoff, setAlphaCutoff() #if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 +in vec4[10] vary_coords; +#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 in vec4[2] vary_coords; #endif in vec3 vary_position; in vec3 vary_normal; -in vec3 vary_tangent; +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) +in vec3 vary_tangents[4]; flat in float vary_sign; +#endif in vec4 vary_texcoord0; in vec4 vary_texcoord1; @@ -144,17 +148,26 @@ void mirrorClip(vec3 position); float terrain_mix(TerrainMix tm, vec4 tms4); +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) +// from mikktspace.com +vec3 mikktspace(vec3 vNt, vec3 vT) +{ + vec3 vN = vary_normal; + + vec3 vB = vary_sign * cross(vN, vT); + vec3 tnorm = normalize( vNt.x * vT + vNt.y * vB + vNt.z * vN ); + + tnorm *= gl_FrontFacing ? 1.0 : -1.0; + + return tnorm; +} +#endif + void main() { // Make sure we clip the terrain if we're in a mirror. mirrorClip(vary_position); -#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 - TerrainCoord terrain_texcoord = vary_coords; -#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 - TerrainCoord terrain_texcoord = vary_texcoord0.xy; -#endif - float alpha1 = texture(alpha_ramp, vary_texcoord0.zw).a; float alpha2 = texture(alpha_ramp,vary_texcoord1.xy).a; float alphaFinal = texture(alpha_ramp, vary_texcoord1.zw).a; @@ -182,9 +195,19 @@ void main() PBRMix pbr_mix = init_pbr_mix(); PBRMix mix2; + TerrainCoord terrain_texcoord; switch (tm.type & MIX_X) { case MIX_X: +#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 + terrain_texcoord[0].xy = vary_coords[0].xy; + terrain_texcoord[0].zw = vary_coords[0].zw; + terrain_texcoord[1].xy = vary_coords[1].xy; + terrain_texcoord[1].zw = vary_coords[1].zw; + terrain_texcoord[2].xy = vary_coords[2].xy; +#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 + terrain_texcoord = vary_coords[0].xy; +#endif mix2 = terrain_sample_and_multiply_pbr( terrain_texcoord , detail_0_base_color @@ -207,7 +230,10 @@ void main() , emissiveColors[0] #endif ); - pbr_mix = mix_pbr(pbr_mix, mix2, tm.weight.x); +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) + mix2.vNt = mikktspace(mix2.vNt, vary_tangents[0]); +#endif + pbr_mix = mix_pbr(mix, mix2, tm.weight.x); break; default: break; @@ -215,6 +241,15 @@ void main() switch (tm.type & MIX_Y) { case MIX_Y: +#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 + terrain_texcoord[0].xy = vary_coords[2].zw; + terrain_texcoord[0].zw = vary_coords[3].xy; + terrain_texcoord[1].xy = vary_coords[3].zw; + terrain_texcoord[1].zw = vary_coords[4].xy; + terrain_texcoord[2].xy = vary_coords[4].zw; +#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 + terrain_texcoord = vary_coords[0].zw; +#endif mix2 = terrain_sample_and_multiply_pbr( terrain_texcoord , detail_1_base_color @@ -237,7 +272,10 @@ void main() , emissiveColors[1] #endif ); - pbr_mix = mix_pbr(pbr_mix, mix2, tm.weight.y); +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) + mix2.vNt = mikktspace(mix2.vNt, vary_tangents[1]); +#endif + pbr_mix = mix_pbr(mix, mix2, tm.weight.y); break; default: break; @@ -245,6 +283,15 @@ void main() switch (tm.type & MIX_Z) { case MIX_Z: +#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 + terrain_texcoord[0].xy = vary_coords[5].xy; + terrain_texcoord[0].zw = vary_coords[5].zw; + terrain_texcoord[1].xy = vary_coords[6].xy; + terrain_texcoord[1].zw = vary_coords[6].zw; + terrain_texcoord[2].xy = vary_coords[7].xy; +#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 + terrain_texcoord = vary_coords[1].xy; +#endif mix2 = terrain_sample_and_multiply_pbr( terrain_texcoord , detail_2_base_color @@ -267,7 +314,10 @@ void main() , emissiveColors[2] #endif ); - pbr_mix = mix_pbr(pbr_mix, mix2, tm.weight.z); +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) + mix2.vNt = mikktspace(mix2.vNt, vary_tangents[2]); +#endif + pbr_mix = mix_pbr(mix, mix2, tm.weight.z); break; default: break; @@ -275,6 +325,15 @@ void main() switch (tm.type & MIX_W) { case MIX_W: +#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 + terrain_texcoord[0].xy = vary_coords[7].zw; + terrain_texcoord[0].zw = vary_coords[8].xy; + terrain_texcoord[1].xy = vary_coords[8].zw; + terrain_texcoord[1].zw = vary_coords[9].xy; + terrain_texcoord[2].xy = vary_coords[9].zw; +#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 + terrain_texcoord = vary_coords[1].zw; +#endif mix2 = terrain_sample_and_multiply_pbr( terrain_texcoord , detail_3_base_color @@ -297,7 +356,10 @@ void main() , emissiveColors[3] #endif ); - pbr_mix = mix_pbr(pbr_mix, mix2, tm.weight.w); +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) + mix2.vNt = mikktspace(mix2.vNt, vary_tangents[3]); +#endif + pbr_mix = mix_pbr(mix, mix2, tm.weight.w); break; default: break; @@ -311,19 +373,11 @@ void main() float base_color_factor_alpha = terrain_mix(tm, vec4(baseColorFactors[0].z, baseColorFactors[1].z, baseColorFactors[2].z, baseColorFactors[3].z)); #if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) - // from mikktspace.com - vec3 vNt = pbr_mix.vNt; - vec3 vN = vary_normal; - vec3 vT = vary_tangent.xyz; - - vec3 vB = vary_sign * cross(vN, vT); - vec3 tnorm = normalize( vNt.x * vT + vNt.y * vB + vNt.z * vN ); - - tnorm *= gl_FrontFacing ? 1.0 : -1.0; + vec3 tnorm = normalize(pbr_mix.vNt); #else vec3 tnorm = vary_normal; - tnorm *= gl_FrontFacing ? 1.0 : -1.0; #endif + tnorm *= gl_FrontFacing ? 1.0 : -1.0; #if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_EMISSIVE) diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainUtilF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainUtilF.glsl index 935c3f9301..7a7fd783ec 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainUtilF.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainUtilF.glsl @@ -233,17 +233,12 @@ float terrain_mix(TerrainMix tm, vec4 tms4) // Triplanar mapping // Pre-transformed texture coordinates for each axial uv slice (Packing: xy, yz, (-x)z, unused) -#define TerrainCoord vec4[2] +#define TerrainCoord vec4[3] -vec2 _t_uv(vec2 uv_unflipped, float sign_or_zero) +// If sign_or_zero is positive, use uv_unflippped, otherwise use uv_flipped +vec2 _t_uv(vec2 uv_unflipped, vec2 uv_flipped, float sign_or_zero) { - // Handle case where sign is 0 - float sign = (2.0*sign_or_zero) + 1.0; - sign /= abs(sign); - // If the vertex normal is negative, flip the texture back - // right-side up. - vec2 uv = uv_unflipped * vec2(sign, 1); - return uv; + return mix(uv_flipped, uv_unflipped, max(0.0, sign_or_zero)); } vec3 _t_normal_post_1(vec3 vNt0, float sign_or_zero) @@ -298,9 +293,9 @@ PBRMix terrain_sample_pbr( { PBRMix mix = init_pbr_mix(); -#define get_uv_x() _t_uv(terrain_coord[0].zw, sign(vary_vertex_normal.x)) -#define get_uv_y() _t_uv(terrain_coord[1].xy, sign(vary_vertex_normal.y)) -#define get_uv_z() _t_uv(terrain_coord[0].xy, sign(vary_vertex_normal.z)) +#define get_uv_x() _t_uv(terrain_coord[0].zw, terrain_coord[1].zw, sign(vary_vertex_normal.x)) +#define get_uv_y() _t_uv(terrain_coord[1].xy, terrain_coord[2].xy, sign(vary_vertex_normal.y)) +#define get_uv_z() _t_uv(terrain_coord[0].xy, vec2(0), sign(vary_vertex_normal.z)) switch (tw.type & SAMPLE_X) { case SAMPLE_X: diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl index ed52297314..f8e826bbdb 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl @@ -23,6 +23,11 @@ * $/LicenseInfo$ */ +#define TERRAIN_PBR_DETAIL_EMISSIVE 0 +#define TERRAIN_PBR_DETAIL_OCCLUSION -1 +#define TERRAIN_PBR_DETAIL_NORMAL -2 +#define TERRAIN_PBR_DETAIL_METALLIC_ROUGHNESS -3 + uniform mat3 normal_matrix; uniform mat4 texture_matrix0; uniform mat4 modelview_matrix; @@ -34,21 +39,25 @@ in vec4 tangent; in vec4 diffuse_color; in vec2 texcoord1; -#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 -out vec4[2] vary_coords; -#endif out vec3 vary_vertex_normal; // Used by pbrterrainUtilF.glsl out vec3 vary_normal; -out vec3 vary_tangent; +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) +out vec3 vary_tangents[4]; flat out float vary_sign; +#endif out vec4 vary_texcoord0; out vec4 vary_texcoord1; +#if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 +out vec4[10] vary_coords; +#elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 +out vec4[2] vary_coords; +#endif out vec3 vary_position; -// *HACK: tangent_space_transform should use texture_normal_transform, or maybe -// we shouldn't use tangent_space_transform at all. See the call to -// tangent_space_transform below. -uniform vec4[2] texture_base_color_transform; +// *HACK: Each material uses only one texture transform, but the KHR texture +// transform spec allows handling texture transforms separately for each +// individual texture info. +uniform vec4[5] terrain_texture_transforms; vec2 terrain_texture_transform(vec2 vertex_texcoord, vec4[2] khr_gltf_transform); vec3 terrain_tangent_space_transform(vec4 vertex_tangent, vec3 vertex_normal, vec4[2] khr_gltf_transform); @@ -63,31 +72,101 @@ void main() vary_vertex_normal = normal; vec3 t = normal_matrix * tangent.xyz; - vary_tangent = normalize(t); - // *TODO: Decide if we want this. It may be better to just calculate the - // tangents on-the-fly in the fragment shader, due to the subtleties of the - // effect of triplanar mapping on UVs. - // *HACK: Should be using texture_normal_transform here. The KHR texture - // transform spec requires handling texture transforms separately for each - // individual texture. - vary_tangent = normalize(terrain_tangent_space_transform(vec4(t, tangent.w), n, texture_base_color_transform)); +#if (TERRAIN_PBR_DETAIL >= TERRAIN_PBR_DETAIL_NORMAL) + { + vec4[2] ttt; + // material 1 + ttt[0].xyz = terrain_texture_transforms[0].xyz; + ttt[1].x = terrain_texture_transforms[0].w; + ttt[1].y = terrain_texture_transforms[1].x; + vary_tangents[0] = normalize(terrain_tangent_space_transform(vec4(t, tangent.w), n, ttt)); + // material 2 + ttt[0].xyz = terrain_texture_transforms[1].yzw; + ttt[1].xy = terrain_texture_transforms[2].xy; + vary_tangents[1] = normalize(terrain_tangent_space_transform(vec4(t, tangent.w), n, ttt)); + // material 3 + ttt[0].xy = terrain_texture_transforms[2].zw; + ttt[0].z = terrain_texture_transforms[3].x; + ttt[1].xy = terrain_texture_transforms[3].yz; + vary_tangents[2] = normalize(terrain_tangent_space_transform(vec4(t, tangent.w), n, ttt)); + // material 4 + ttt[0].x = terrain_texture_transforms[3].w; + ttt[0].yz = terrain_texture_transforms[4].xy; + ttt[1].xy = terrain_texture_transforms[4].zw; + vary_tangents[3] = normalize(terrain_tangent_space_transform(vec4(t, tangent.w), n, ttt)); + } + vary_sign = tangent.w; +#endif vary_normal = normalize(n); // Transform and pass tex coords - // *HACK: texture_base_color_transform is used for all of these here, but - // the KHR texture transform spec requires handling texture transforms - // separately for each individual texture. + { + vec4[2] ttt; #if TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 3 - // xy - vary_coords[0].xy = terrain_texture_transform(position.xy, texture_base_color_transform); - // yz - vary_coords[0].zw = terrain_texture_transform(position.yz, texture_base_color_transform); - // (-x)z - vary_coords[1].xy = terrain_texture_transform(position.xz * vec2(-1, 1), texture_base_color_transform); +// Don't care about upside-down (transform_xy_flipped()) +#define transform_xy() terrain_texture_transform(position.xy, ttt) +#define transform_yz() terrain_texture_transform(position.yz, ttt) +#define transform_negx_z() terrain_texture_transform(position.xz * vec2(-1, 1), ttt) +#define transform_yz_flipped() terrain_texture_transform(position.yz * vec2(-1, 1), ttt) +#define transform_negx_z_flipped() terrain_texture_transform(position.xz, ttt) + // material 1 + ttt[0].xyz = terrain_texture_transforms[0].xyz; + ttt[1].x = terrain_texture_transforms[0].w; + ttt[1].y = terrain_texture_transforms[1].x; + vary_coords[0].xy = transform_xy(); + vary_coords[0].zw = transform_yz(); + vary_coords[1].xy = transform_negx_z(); + vary_coords[1].zw = transform_yz_flipped(); + vary_coords[2].xy = transform_negx_z_flipped(); + // material 2 + ttt[0].xyz = terrain_texture_transforms[1].yzw; + ttt[1].xy = terrain_texture_transforms[2].xy; + vary_coords[2].zw = transform_xy(); + vary_coords[3].xy = transform_yz(); + vary_coords[3].zw = transform_negx_z(); + vary_coords[4].xy = transform_yz_flipped(); + vary_coords[4].zw = transform_negx_z_flipped(); + // material 3 + ttt[0].xy = terrain_texture_transforms[2].zw; + ttt[0].z = terrain_texture_transforms[3].x; + ttt[1].xy = terrain_texture_transforms[3].yz; + vary_coords[5].xy = transform_xy(); + vary_coords[5].zw = transform_yz(); + vary_coords[6].xy = transform_negx_z(); + vary_coords[6].zw = transform_yz_flipped(); + vary_coords[7].xy = transform_negx_z_flipped(); + // material 4 + ttt[0].x = terrain_texture_transforms[3].w; + ttt[0].yz = terrain_texture_transforms[4].xy; + ttt[1].xy = terrain_texture_transforms[4].zw; + vary_coords[7].zw = transform_xy(); + vary_coords[8].xy = transform_yz(); + vary_coords[8].zw = transform_negx_z(); + vary_coords[9].xy = transform_yz_flipped(); + vary_coords[9].zw = transform_negx_z_flipped(); #elif TERRAIN_PLANAR_TEXTURE_SAMPLE_COUNT == 1 - vary_texcoord0.xy = terrain_texture_transform(position.xy, texture_base_color_transform); + // material 1 + ttt[0].xyz = terrain_texture_transforms[0].xyz; + ttt[1].x = terrain_texture_transforms[0].w; + ttt[1].y = terrain_texture_transforms[1].x; + vary_coords[0].xy = terrain_texture_transform(position.xy, ttt); + // material 2 + ttt[0].xyz = terrain_texture_transforms[1].yzw; + ttt[1].xy = terrain_texture_transforms[2].xy; + vary_coords[0].zw = terrain_texture_transform(position.xy, ttt); + // material 3 + ttt[0].xy = terrain_texture_transforms[2].zw; + ttt[0].z = terrain_texture_transforms[3].x; + ttt[1].xy = terrain_texture_transforms[3].yz; + vary_coords[1].xy = terrain_texture_transform(position.xy, ttt); + // material 4 + ttt[0].x = terrain_texture_transforms[3].w; + ttt[0].yz = terrain_texture_transforms[4].xy; + ttt[1].xy = terrain_texture_transforms[4].zw; + vary_coords[1].zw = terrain_texture_transform(position.xy, ttt); #endif + } vec4 tc = vec4(texcoord1,0,1); vary_texcoord0.zw = tc.xy; diff --git a/indra/newview/app_settings/shaders/class1/deferred/screenSpaceReflUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/screenSpaceReflUtil.glsl index cf0595ee45..6791fe44d9 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/screenSpaceReflUtil.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/screenSpaceReflUtil.glsl @@ -25,13 +25,13 @@ // debug stub -float random (vec2 uv) +float random (vec2 uv) { - return 0; + return 0.f; } float tapScreenSpaceReflection(int totalSamples, vec2 tc, vec3 viewPos, vec3 n, inout vec4 collectedColor, sampler2D source, float glossiness) { collectedColor = vec4(0); - return 0; + return 0.f; } diff --git a/indra/newview/app_settings/shaders/class1/deferred/textureUtilV.glsl b/indra/newview/app_settings/shaders/class1/deferred/textureUtilV.glsl index 7c02cb9d4a..bf5d106dab 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/textureUtilV.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/textureUtilV.glsl @@ -48,6 +48,7 @@ vec2 khr_texture_transform(vec2 texcoord, vec2 scale, float rotation, vec2 offse return (transform * vec3(texcoord, 1)).xy; } +// A texture transform function for PBR materials applied to shape prims/Collada model prims // vertex_texcoord - The UV texture coordinates sampled from the vertex at // runtime. Per SL convention, this is in a right-handed UV coordinate // system. Collada models also have right-handed UVs. @@ -134,7 +135,8 @@ vec3 tangent_space_transform(vec4 vertex_tangent, vec3 vertex_normal, vec4[2] kh return (weights.x * vertex_binormal.xyz) + (weights.y * vertex_tangent.xyz); } -// Similar to tangent_space_transform but no no texture animation support. +// Similar to tangent_space_transform but no offset during coordinate system +// conversion, and no texture animation support. vec3 terrain_tangent_space_transform(vec4 vertex_tangent, vec3 vertex_normal, vec4[2] khr_gltf_transform) { // Immediately convert to left-handed coordinate system ((0,1) -> (0, -1)) |