diff options
Diffstat (limited to 'modules/csg/csg_shape.cpp')
| -rw-r--r-- | modules/csg/csg_shape.cpp | 127 |
1 files changed, 124 insertions, 3 deletions
diff --git a/modules/csg/csg_shape.cpp b/modules/csg/csg_shape.cpp index 4eb798de11..23d879e1cd 100644 --- a/modules/csg/csg_shape.cpp +++ b/modules/csg/csg_shape.cpp @@ -159,6 +159,74 @@ CSGBrush *CSGShape::_get_brush() { return brush; } +int CSGShape::mikktGetNumFaces(const SMikkTSpaceContext *pContext) { + ShapeUpdateSurface &surface = *((ShapeUpdateSurface *)pContext->m_pUserData); + + return surface.vertices.size() / 3; +} + +int CSGShape::mikktGetNumVerticesOfFace(const SMikkTSpaceContext *pContext, const int iFace) { + // always 3 + return 3; +} + +void CSGShape::mikktGetPosition(const SMikkTSpaceContext *pContext, float fvPosOut[], const int iFace, const int iVert) { + ShapeUpdateSurface &surface = *((ShapeUpdateSurface *)pContext->m_pUserData); + + Vector3 v = surface.verticesw[iFace * 3 + iVert]; + fvPosOut[0] = v.x; + fvPosOut[1] = v.y; + fvPosOut[2] = v.z; +} + +void CSGShape::mikktGetNormal(const SMikkTSpaceContext *pContext, float fvNormOut[], const int iFace, const int iVert) { + ShapeUpdateSurface &surface = *((ShapeUpdateSurface *)pContext->m_pUserData); + + Vector3 n = surface.normalsw[iFace * 3 + iVert]; + fvNormOut[0] = n.x; + fvNormOut[1] = n.y; + fvNormOut[2] = n.z; +} + +void CSGShape::mikktGetTexCoord(const SMikkTSpaceContext *pContext, float fvTexcOut[], const int iFace, const int iVert) { + ShapeUpdateSurface &surface = *((ShapeUpdateSurface *)pContext->m_pUserData); + + Vector2 t = surface.uvsw[iFace * 3 + iVert]; + fvTexcOut[0] = t.x; + 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; + + // Godot seems to want the tangent flipped because our handedness is reversed.. + 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) { + + ShapeUpdateSurface &surface = *((ShapeUpdateSurface *)pContext->m_pUserData); + + 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]); + float d = bitangent.dot(normal.cross(tangent)); + + // Godot seems to want the tangent flipped because our handedness is reversed.. + i *= 4; + surface.tansw[i++] = -tangent.x; + surface.tansw[i++] = -tangent.y; + surface.tansw[i++] = -tangent.z; + surface.tansw[i++] = d < 0 ? -1 : 1; +} + void CSGShape::_update_shape() { if (parent) @@ -211,6 +279,9 @@ void CSGShape::_update_shape() { surfaces.write[i].vertices.resize(face_count[i] * 3); surfaces.write[i].normals.resize(face_count[i] * 3); surfaces.write[i].uvs.resize(face_count[i] * 3); + if (calculate_tangents) { + surfaces.write[i].tans.resize(face_count[i] * 3 * 4); + } surfaces.write[i].last_added = 0; if (i != surfaces.size() - 1) { @@ -220,6 +291,9 @@ void CSGShape::_update_shape() { surfaces.write[i].verticesw = surfaces.write[i].vertices.write(); surfaces.write[i].normalsw = surfaces.write[i].normals.write(); surfaces.write[i].uvsw = surfaces.write[i].uvs.write(); + if (calculate_tangents) { + surfaces.write[i].tansw = surfaces.write[i].tans.write(); + } } //fill arrays @@ -274,9 +348,19 @@ void CSGShape::_update_shape() { normal = -normal; } - surfaces[idx].verticesw[last + order[j]] = v; - surfaces[idx].uvsw[last + order[j]] = n->faces[i].uvs[j]; - surfaces[idx].normalsw[last + order[j]] = normal; + int k = last + order[j]; + surfaces[idx].verticesw[k] = v; + surfaces[idx].uvsw[k] = n->faces[i].uvs[j]; + surfaces[idx].normalsw[k] = normal; + + if (calculate_tangents) { + // zero out our tangents for now + k *= 4; + surfaces[idx].tansw[k++] = 0.0; + surfaces[idx].tansw[k++] = 0.0; + surfaces[idx].tansw[k++] = 0.0; + surfaces[idx].tansw[k++] = 0.0; + } } surfaces.write[idx].last_added += 3; @@ -287,20 +371,43 @@ void CSGShape::_update_shape() { //create surfaces for (int i = 0; i < surfaces.size(); i++) { + // calculate tangents for this surface + bool have_tangents = calculate_tangents; + if (have_tangents) { + SMikkTSpaceInterface mkif; + mkif.m_getNormal = mikktGetNormal; + mkif.m_getNumFaces = mikktGetNumFaces; + mkif.m_getNumVerticesOfFace = mikktGetNumVerticesOfFace; + mkif.m_getPosition = mikktGetPosition; + mkif.m_getTexCoord = mikktGetTexCoord; + mkif.m_setTSpace = mikktSetTSpaceDefault; + mkif.m_setTSpaceBasic = NULL; + + SMikkTSpaceContext msc; + msc.m_pInterface = &mkif; + msc.m_pUserData = &surfaces.write[i]; + have_tangents = genTangSpaceDefault(&msc); + } + // unset write access surfaces.write[i].verticesw = PoolVector<Vector3>::Write(); surfaces.write[i].normalsw = PoolVector<Vector3>::Write(); surfaces.write[i].uvsw = PoolVector<Vector2>::Write(); + surfaces.write[i].tansw = PoolVector<float>::Write(); if (surfaces[i].last_added == 0) continue; + // and convert to surface array Array array; array.resize(Mesh::ARRAY_MAX); array[Mesh::ARRAY_VERTEX] = surfaces[i].vertices; array[Mesh::ARRAY_NORMAL] = surfaces[i].normals; array[Mesh::ARRAY_TEX_UV] = surfaces[i].uvs; + if (have_tangents) { + array[Mesh::ARRAY_TANGENT] = surfaces[i].tans; + } int idx = root_mesh->get_surface_count(); root_mesh->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES, array); @@ -400,6 +507,15 @@ CSGShape::Operation CSGShape::get_operation() const { return operation; } +void CSGShape::set_calculate_tangents(bool p_calculate_tangents) { + calculate_tangents = p_calculate_tangents; + _make_dirty(); +} + +bool CSGShape::is_calculating_tangents() const { + return calculate_tangents; +} + void CSGShape::_validate_property(PropertyInfo &property) const { if (is_inside_tree() && property.name.begins_with("use_collision") && !is_root_shape()) { //hide collision if not root @@ -421,9 +537,13 @@ void CSGShape::_bind_methods() { ClassDB::bind_method(D_METHOD("set_snap", "snap"), &CSGShape::set_snap); ClassDB::bind_method(D_METHOD("get_snap"), &CSGShape::get_snap); + ClassDB::bind_method(D_METHOD("set_calculate_tangents", "enabled"), &CSGShape::set_calculate_tangents); + ClassDB::bind_method(D_METHOD("is_calculating_tangents"), &CSGShape::is_calculating_tangents); + ADD_PROPERTY(PropertyInfo(Variant::INT, "operation", PROPERTY_HINT_ENUM, "Union,Intersection,Subtraction"), "set_operation", "get_operation"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_collision"), "set_use_collision", "is_using_collision"); ADD_PROPERTY(PropertyInfo(Variant::REAL, "snap", PROPERTY_HINT_RANGE, "0.0001,1,0.001"), "set_snap", "get_snap"); + ADD_PROPERTY(PropertyInfo(Variant::BOOL, "calculate_tangents"), "set_calculate_tangents", "is_calculating_tangents"); BIND_ENUM_CONSTANT(OPERATION_UNION); BIND_ENUM_CONSTANT(OPERATION_INTERSECTION); @@ -438,6 +558,7 @@ CSGShape::CSGShape() { use_collision = false; operation = OPERATION_UNION; snap = 0.001; + calculate_tangents = true; } CSGShape::~CSGShape() { |