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100 lines
3.1 KiB
GDScript
100 lines
3.1 KiB
GDScript
const Faces = preload("./Faces.gd");
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const vox_to_godot = Basis(Vector3.RIGHT, Vector3.FORWARD, Vector3.UP);
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func generate(vox, voxel_data, scale, snaptoground):
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var generator = VoxelMeshGenerator.new(vox, voxel_data, scale, snaptoground);
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return generator.generate_mesh();
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class MeshGenerator:
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var surfaces = {};
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func ensure_surface_exists(surface_index: int, color: Color, material: Material):
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if (surfaces.has(surface_index)): return;
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var st = SurfaceTool.new();
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st.begin(Mesh.PRIMITIVE_TRIANGLES);
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st.set_color(color);
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st.set_material(material);
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surfaces[surface_index] = st;
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func add_vertex(surface_index: int, vertex: Vector3):
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var st = surfaces[surface_index] as SurfaceTool;
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st.add_vertex(vertex);
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func combine_surfaces():
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var mesh = null;
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for surface_index in surfaces:
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var surface = surfaces[surface_index] as SurfaceTool;
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surface.index();
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surface.generate_normals();
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mesh = surface.commit(mesh);
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var new_surface_index = mesh.get_surface_count() - 1;
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var name = str(surface_index);
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mesh.surface_set_name(new_surface_index, name);
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return mesh;
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class VoxelMeshGenerator:
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var vox;
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var voxel_data = {};
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var scale:float;
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var snaptoground:bool;
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func _init(vox,voxel_data,scale,snaptoground):
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self.vox = vox;
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self.voxel_data = voxel_data;
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self.scale = scale;
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self.snaptoground = snaptoground;
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func get_material(voxel):
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var surface_index = voxel_data[voxel];
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return vox.materials[surface_index]
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func face_is_visible(voxel, face):
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if (not voxel_data.has(voxel + face)):
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return true;
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var local_material = get_material(voxel);
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var adj_material = get_material(voxel + face);
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return adj_material.is_glass() && !local_material.is_glass();
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func generate_mesh():
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# Minimum extends of the volume
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var mins :Vector3 = Vector3(1000000, 1000000, 1000000)
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# Maximum extends of the volume
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var maxs :Vector3 = Vector3(-1000000,-1000000,-1000000)
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# Find bounds
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for v in voxel_data:
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mins.x = min(mins.x, v.x)
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mins.y = min(mins.y, v.y)
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mins.z = min(mins.z, v.z)
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maxs.x = max(maxs.x, v.x)
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maxs.y = max(maxs.y, v.y)
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maxs.z = max(maxs.z, v.z)
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var vox_to_godot = Basis(Vector3.RIGHT, Vector3.FORWARD, Vector3.UP);
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var yoffset = Vector3(0,0,0);
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if snaptoground : yoffset = Vector3(0, -mins.z * scale, 0);
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var gen = MeshGenerator.new();
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for voxel in voxel_data:
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var voxelSides = []
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if face_is_visible(voxel, Vector3.UP): voxelSides += Faces.Top
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if face_is_visible(voxel, Vector3.DOWN): voxelSides += Faces.Bottom
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if face_is_visible(voxel, Vector3.LEFT): voxelSides += Faces.Left
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if face_is_visible(voxel, Vector3.RIGHT): voxelSides += Faces.Right
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if face_is_visible(voxel, Vector3.BACK): voxelSides += Faces.Front
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if face_is_visible(voxel, Vector3.FORWARD): voxelSides += Faces.Back
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var surface_index = voxel_data[voxel];
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var color = vox.colors[surface_index];
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var material = vox.materials[surface_index].get_material(color);
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gen.ensure_surface_exists(surface_index, color, material);
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for t in voxelSides:
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gen.add_vertex(surface_index, yoffset + vox_to_godot * (t + voxel) * scale);
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return gen.combine_surfaces();
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