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Reverse bitangent on everythings to ensure default normal map behavriour is consistent

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This commit is contained in:
Bastiaan Olij 2018-12-08 13:43:46 +11:00
parent 9b78147bce
commit fa63a0fe83
8 changed files with 29 additions and 50 deletions
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2
editor/import/editor_import_collada.cpp
View file

@ -771,7 +771,7 @@ Error ColladaImport::_create_mesh_surfaces(bool p_optimize, Ref<ArrayMesh> &p_me
int binormal_pos = (binormal_src->stride ? binormal_src->stride : 3) * p.indices[src + binormal_ofs];
ERR_FAIL_INDEX_V(binormal_pos, binormal_src->array.size(), ERR_INVALID_DATA);
Vector3 binormal = Vector3(-binormal_src->array[binormal_pos + 0], -binormal_src->array[binormal_pos + 1], -binormal_src->array[binormal_pos + 2]); // Due to Godots face order it seems we need to flip our binormal!
Vector3 binormal = Vector3(binormal_src->array[binormal_pos + 0], binormal_src->array[binormal_pos + 1], binormal_src->array[binormal_pos + 2]);
int tangent_pos = (tangent_src->stride ? tangent_src->stride : 3) * p.indices[src + tangent_ofs];
ERR_FAIL_INDEX_V(tangent_pos, tangent_src->array.size(), ERR_INVALID_DATA);

11
editor/import/editor_scene_importer_gltf.cpp
View file

@ -899,16 +899,7 @@ Error EditorSceneImporterGLTF::_parse_meshes(GLTFState &state) {
array[Mesh::ARRAY_NORMAL] = _decode_accessor_as_vec3(state, a["NORMAL"], true);
}
if (a.has("TANGENT")) {
PoolVector<float> tans = _decode_accessor_as_floats(state, a["TANGENT"], true);
{ // we need our binormals inversed, so flip our w component.
int ts = tans.size();
PoolVector<float>::Write w = tans.write();
for (int j = 3; j < ts; j += 4) {
w[j] *= -1.0;
}
}
array[Mesh::ARRAY_TANGENT] = tans;
array[Mesh::ARRAY_TANGENT] = _decode_accessor_as_floats(state, a["TANGENT"], true);
}
if (a.has("TEXCOORD_0")) {
array[Mesh::ARRAY_TEX_UV] = _decode_accessor_as_vec2(state, a["TEXCOORD_0"], true);

13
modules/csg/csg_shape.cpp
View file

@ -197,17 +197,6 @@ void CSGShape::mikktGetTexCoord(const SMikkTSpaceContext *pContext, float fvTexc
fvTexcOut[1] = t.y;
}
void CSGShape::mikktSetTSpaceBasic(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fSign, const int iFace, const int iVert) {
ShapeUpdateSurface &surface = *((ShapeUpdateSurface *)pContext->m_pUserData);
int i = (iFace * 3 + iVert) * 4;
surface.tansw[i++] = fvTangent[0];
surface.tansw[i++] = fvTangent[1];
surface.tansw[i++] = fvTangent[2];
surface.tansw[i++] = fSign;
}
void CSGShape::mikktSetTSpaceDefault(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fvBiTangent[], const float fMagS, const float fMagT,
const tbool bIsOrientationPreserving, const int iFace, const int iVert) {
@ -216,7 +205,7 @@ void CSGShape::mikktSetTSpaceDefault(const SMikkTSpaceContext *pContext, const f
int i = iFace * 3 + iVert;
Vector3 normal = surface.normalsw[i];
Vector3 tangent = Vector3(fvTangent[0], fvTangent[1], fvTangent[2]);
Vector3 bitangent = Vector3(fvBiTangent[0], fvBiTangent[1], fvBiTangent[2]);
Vector3 bitangent = Vector3(-fvBiTangent[0], -fvBiTangent[1], -fvBiTangent[2]); // for some reason these are reversed, something with the coordinate system in Godot
float d = bitangent.dot(normal.cross(tangent));
i *= 4;

1
modules/csg/csg_shape.h
View file

@ -97,7 +97,6 @@ private:
static void mikktGetPosition(const SMikkTSpaceContext *pContext, float fvPosOut[], const int iFace, const int iVert);
static void mikktGetNormal(const SMikkTSpaceContext *pContext, float fvNormOut[], const int iFace, const int iVert);
static void mikktGetTexCoord(const SMikkTSpaceContext *pContext, float fvTexcOut[], const int iFace, const int iVert);
static void mikktSetTSpaceBasic(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fSign, const int iFace, const int iVert);
static void mikktSetTSpaceDefault(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fvBiTangent[], const float fMagS, const float fMagT,
const tbool bIsOrientationPreserving, const int iFace, const int iVert);

4
scene/3d/sprite_3d.cpp
View file

@ -463,9 +463,9 @@ void Sprite3D::_draw() {
Plane tangent;
if (axis == Vector3::AXIS_X) {
tangent = Plane(0, 0, -1, -1);
tangent = Plane(0, 0, -1, 1);
} else {
tangent = Plane(1, 0, 0, -1);
tangent = Plane(1, 0, 0, 1);
}
RID mat = SpatialMaterial::get_material_rid_for_2d(get_draw_flag(FLAG_SHADED), get_draw_flag(FLAG_TRANSPARENT), get_draw_flag(FLAG_DOUBLE_SIDED), get_alpha_cut_mode() == ALPHA_CUT_DISCARD, get_alpha_cut_mode() == ALPHA_CUT_OPAQUE_PREPASS);

2
scene/resources/material.cpp
View file

@ -699,7 +699,7 @@ void SpatialMaterial::_update_shader() {
if (features[FEATURE_DEPTH_MAPPING] && !flags[FLAG_UV1_USE_TRIPLANAR]) { //depthmap not supported with triplanar
code += "\t{\n";
code += "\t\tvec3 view_dir = normalize(normalize(-VERTEX)*mat3(TANGENT*depth_flip.x,BINORMAL*depth_flip.y,NORMAL));\n"; // binormal is negative due to mikktspace
code += "\t\tvec3 view_dir = normalize(normalize(-VERTEX)*mat3(TANGENT*depth_flip.x,-BINORMAL*depth_flip.y,NORMAL));\n"; // binormal is negative due to mikktspace, flip 'unflips' it ;-)
if (deep_parallax) {
code += "\t\tfloat num_layers = mix(float(depth_max_layers),float(depth_min_layers), abs(dot(vec3(0.0, 0.0, 1.0), view_dir)));\n";

44
scene/resources/primitive_meshes.cpp
View file

@ -306,7 +306,7 @@ void CapsuleMesh::_create_mesh_array(Array &p_arr) const {
Vector3 p = Vector3(x * radius * w, y * radius * w, z);
points.push_back(p + Vector3(0.0, 0.0, 0.5 * mid_height));
normals.push_back(p.normalized());
ADD_TANGENT(-y, x, 0.0, -1.0)
ADD_TANGENT(-y, x, 0.0, 1.0)
uvs.push_back(Vector2(u, v * onethird));
point++;
@ -345,7 +345,7 @@ void CapsuleMesh::_create_mesh_array(Array &p_arr) const {
Vector3 p = Vector3(x * radius, y * radius, z);
points.push_back(p);
normals.push_back(Vector3(x, y, 0.0));
ADD_TANGENT(-y, x, 0.0, -1.0)
ADD_TANGENT(-y, x, 0.0, 1.0)
uvs.push_back(Vector2(u, onethird + (v * onethird)));
point++;
@ -385,7 +385,7 @@ void CapsuleMesh::_create_mesh_array(Array &p_arr) const {
Vector3 p = Vector3(x * radius * w, y * radius * w, z);
points.push_back(p + Vector3(0.0, 0.0, -0.5 * mid_height));
normals.push_back(p.normalized());
ADD_TANGENT(-y, x, 0.0, -1.0)
ADD_TANGENT(-y, x, 0.0, 1.0)
uvs.push_back(Vector2(u, twothirds + ((v - 1.0) * onethird)));
point++;
@ -514,14 +514,14 @@ void CubeMesh::_create_mesh_array(Array &p_arr) const {
// front
points.push_back(Vector3(x, -y, -start_pos.z)); // double negative on the Z!
normals.push_back(Vector3(0.0, 0.0, 1.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(u, v));
point++;
// back
points.push_back(Vector3(-x, -y, start_pos.z));
normals.push_back(Vector3(0.0, 0.0, -1.0));
ADD_TANGENT(-1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(-1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(twothirds + u, v));
point++;
@ -568,14 +568,14 @@ void CubeMesh::_create_mesh_array(Array &p_arr) const {
// right
points.push_back(Vector3(-start_pos.x, -y, -z));
normals.push_back(Vector3(1.0, 0.0, 0.0));
ADD_TANGENT(0.0, 0.0, -1.0, -1.0);
ADD_TANGENT(0.0, 0.0, -1.0, 1.0);
uvs.push_back(Vector2(onethird + u, v));
point++;
// left
points.push_back(Vector3(start_pos.x, -y, z));
normals.push_back(Vector3(-1.0, 0.0, 0.0));
ADD_TANGENT(0.0, 0.0, 1.0, -1.0);
ADD_TANGENT(0.0, 0.0, 1.0, 1.0);
uvs.push_back(Vector2(u, 0.5 + v));
point++;
@ -622,14 +622,14 @@ void CubeMesh::_create_mesh_array(Array &p_arr) const {
// top
points.push_back(Vector3(-x, -start_pos.y, -z));
normals.push_back(Vector3(0.0, 1.0, 0.0));
ADD_TANGENT(-1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(-1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(onethird + u, 0.5 + v));
point++;
// bottom
points.push_back(Vector3(x, start_pos.y, -z));
normals.push_back(Vector3(0.0, -1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(twothirds + u, 0.5 + v));
point++;
@ -773,7 +773,7 @@ void CylinderMesh::_create_mesh_array(Array &p_arr) const {
Vector3 p = Vector3(x * radius, y, z * radius);
points.push_back(p);
normals.push_back(Vector3(x, 0.0, z));
ADD_TANGENT(z, 0.0, -x, -1.0)
ADD_TANGENT(z, 0.0, -x, 1.0)
uvs.push_back(Vector2(u, v * 0.5));
point++;
@ -799,7 +799,7 @@ void CylinderMesh::_create_mesh_array(Array &p_arr) const {
thisrow = point;
points.push_back(Vector3(0.0, y, 0.0));
normals.push_back(Vector3(0.0, 1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0)
ADD_TANGENT(1.0, 0.0, 0.0, 1.0)
uvs.push_back(Vector2(0.25, 0.75));
point++;
@ -816,7 +816,7 @@ void CylinderMesh::_create_mesh_array(Array &p_arr) const {
Vector3 p = Vector3(x * top_radius, y, z * top_radius);
points.push_back(p);
normals.push_back(Vector3(0.0, 1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0)
ADD_TANGENT(1.0, 0.0, 0.0, 1.0)
uvs.push_back(Vector2(u, v));
point++;
@ -835,7 +835,7 @@ void CylinderMesh::_create_mesh_array(Array &p_arr) const {
thisrow = point;
points.push_back(Vector3(0.0, y, 0.0));
normals.push_back(Vector3(0.0, -1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0)
ADD_TANGENT(1.0, 0.0, 0.0, 1.0)
uvs.push_back(Vector2(0.75, 0.75));
point++;
@ -852,7 +852,7 @@ void CylinderMesh::_create_mesh_array(Array &p_arr) const {
Vector3 p = Vector3(x * bottom_radius, y, z * bottom_radius);
points.push_back(p);
normals.push_back(Vector3(0.0, -1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0)
ADD_TANGENT(1.0, 0.0, 0.0, 1.0)
uvs.push_back(Vector2(u, v));
point++;
@ -982,7 +982,7 @@ void PlaneMesh::_create_mesh_array(Array &p_arr) const {
points.push_back(Vector3(-x, 0.0, -z));
normals.push_back(Vector3(0.0, 1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(1.0 - u, 1.0 - v)); /* 1.0 - uv to match orientation with Quad */
point++;
@ -1108,14 +1108,14 @@ void PrismMesh::_create_mesh_array(Array &p_arr) const {
/* front */
points.push_back(Vector3(start_x + x, -y, -start_pos.z)); // double negative on the Z!
normals.push_back(Vector3(0.0, 0.0, 1.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(offset_front + u, v));
point++;
/* back */
points.push_back(Vector3(start_x + scaled_size_x - x, -y, start_pos.z));
normals.push_back(Vector3(0.0, 0.0, -1.0));
ADD_TANGENT(-1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(-1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(twothirds + offset_back + u, v));
point++;
@ -1187,14 +1187,14 @@ void PrismMesh::_create_mesh_array(Array &p_arr) const {
/* right */
points.push_back(Vector3(right, -y, -z));
normals.push_back(normal_right);
ADD_TANGENT(0.0, 0.0, -1.0, -1.0);
ADD_TANGENT(0.0, 0.0, -1.0, 1.0);
uvs.push_back(Vector2(onethird + u, v));
point++;
/* left */
points.push_back(Vector3(left, -y, z));
normals.push_back(normal_left);
ADD_TANGENT(0.0, 0.0, 1.0, -1.0);
ADD_TANGENT(0.0, 0.0, 1.0, 1.0);
uvs.push_back(Vector2(u, 0.5 + v));
point++;
@ -1241,7 +1241,7 @@ void PrismMesh::_create_mesh_array(Array &p_arr) const {
/* bottom */
points.push_back(Vector3(x, start_pos.y, -z));
normals.push_back(Vector3(0.0, -1.0, 0.0));
ADD_TANGENT(1.0, 0.0, 0.0, -1.0);
ADD_TANGENT(1.0, 0.0, 0.0, 1.0);
uvs.push_back(Vector2(twothirds + u, 0.5 + v));
point++;
@ -1382,7 +1382,7 @@ void QuadMesh::_create_mesh_array(Array &p_arr) const {
tangents.set(i * 4 + 0, 1.0);
tangents.set(i * 4 + 1, 0.0);
tangents.set(i * 4 + 2, 0.0);
tangents.set(i * 4 + 3, -1.0);
tangents.set(i * 4 + 3, 1.0);
static const Vector2 quad_uv[4] = {
Vector2(0, 1),
@ -1468,7 +1468,7 @@ void SphereMesh::_create_mesh_array(Array &p_arr) const {
points.push_back(p);
normals.push_back(p.normalized());
};
ADD_TANGENT(z, 0.0, -x, -1.0)
ADD_TANGENT(z, 0.0, -x, 1.0)
uvs.push_back(Vector2(u, v));
point++;

2
scene/resources/surface_tool.cpp
View file

@ -853,7 +853,7 @@ void SurfaceTool::mikktSetTSpaceDefault(const SMikkTSpaceContext *pContext, cons
if (vtx != NULL) {
vtx->tangent = Vector3(fvTangent[0], fvTangent[1], fvTangent[2]);
vtx->binormal = Vector3(fvBiTangent[0], fvBiTangent[1], fvBiTangent[2]);
vtx->binormal = Vector3(-fvBiTangent[0], -fvBiTangent[1], -fvBiTangent[2]); // for some reason these are reversed, something with the coordinate system in Godot
}
}