281 lines
9.4 KiB
C++
281 lines
9.4 KiB
C++
/*
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Gizmo move
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ref: Blender 4
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0 9-10
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*----------------->>>>
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| 5+
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| +6
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v
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假设轴尺寸为10
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箭头长度为2，直径为2
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双轴调节正方形，长宽为1，位置为5,5
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中心球半径为1
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*/
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#include"GizmoResource.h"
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#include<hgl/graph/SceneNode.h>
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#include<hgl/graph/VKRenderResource.h>
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#include<hgl/graph/InlineGeometry.h>
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#include<hgl/graph/RenderFramework.h>
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#include<hgl/graph/Scene.h>
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#include<hgl/component/MeshComponent.h>
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#include<hgl/io/event/MouseEvent.h>
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#include<hgl/graph/Ray.h>
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#include<iostream>
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VK_NAMESPACE_BEGIN
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namespace
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{
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/**
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* 移动 Gizmo 节点
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*/
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class GizmoMoveNode:public SceneNode,io::MouseEvent
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{
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struct GizmoMoveAxis
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{
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MaterialInstance *mi; //材质实例
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MeshComponent *cylinder; //圆柱
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MeshComponent *cone; //圆锥
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MeshComponent *square; //双轴调节正方形
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};
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MaterialInstance *pick_mi;
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MeshComponent *sphere=nullptr;
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GizmoMoveAxis axis[3]{}; //X,Y,Z 三个轴
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public:
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using SceneNode::SceneNode;
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io::EventDispatcher *GetEventDispatcher() override
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{
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return this; // GizmoMoveNode 处理鼠标事件
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}
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SceneNode *CreateNode()const override
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{
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return(new GizmoMoveNode);
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}
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void DuplicationComponents(SceneNode *node) const override
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{
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GizmoMoveNode *gmn=(GizmoMoveNode *)node;
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if(!gmn)
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return;
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gmn->pick_mi=pick_mi;
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#define DUPLICATION_COMPONENT(c) gmn->c=(MeshComponent *)(c->Duplication()); \
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gmn->AttachComponent(gmn->c);
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DUPLICATION_COMPONENT(sphere);
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for(size_t i=0;i<3;i++)
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{
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gmn->axis[i].mi=axis[i].mi; // 复制材质实例
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DUPLICATION_COMPONENT(axis[i].cylinder);
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DUPLICATION_COMPONENT(axis[i].cone);
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DUPLICATION_COMPONENT(axis[i].square);
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}
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#undef DUPLICATION_COMPONENT
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}
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bool CreateGizmoGeometry(RenderFramework *render_framework)
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{
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ComponentDataPtr SpherePtr =GetGizmoMeshCDP(GizmoShape::Sphere);
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ComponentDataPtr CylinderPtr=GetGizmoMeshCDP(GizmoShape::Cylinder);
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ComponentDataPtr ConePtr =GetGizmoMeshCDP(GizmoShape::Cone);
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ComponentDataPtr SquarePtr =GetGizmoMeshCDP(GizmoShape::Square);
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if(!SpherePtr )return(false);
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if(!CylinderPtr )return(false);
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if(!ConePtr )return(false);
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if(!SquarePtr )return(false);
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CreateComponentInfo cci(this);
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pick_mi=GetGizmoMI3D(GizmoColor::Yellow); //获取拾取材质实例
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sphere=render_framework->CreateComponent<MeshComponent>(&cci,SpherePtr); //中心球
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sphere->SetOverrideMaterial(GetGizmoMI3D(GizmoColor::White)); //白色
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{
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Transform tm;
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GizmoMoveAxis *gma;
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const Vector3f one_scale(1);
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const Vector3f square_scale(2);
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const Vector3f cylinder_scale(GIZMO_CYLINDER_RADIUS,GIZMO_CYLINDER_RADIUS,GIZMO_CYLINDER_HALF_LENGTH);
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{
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gma=axis+size_t(AXIS::Z);
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gma->mi=GetGizmoMI3D(GizmoColor::Blue);
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tm.SetScale(cylinder_scale);
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tm.SetTranslation(0,0,GIZMO_CYLINDER_OFFSET);
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cci.mat=tm;
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gma->cylinder=render_framework->CreateComponent<MeshComponent>(&cci,CylinderPtr); //Z 向上圆柱
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gma->cylinder->SetOverrideMaterial(gma->mi);
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tm.SetScale(one_scale);
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tm.SetTranslation(0,0,GIZMO_CONE_OFFSET);
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cci.mat=tm;
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gma->cone=render_framework->CreateComponent<MeshComponent>(&cci,ConePtr); //Z 向上圆锥
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gma->cone->SetOverrideMaterial(gma->mi);
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tm.SetScale(square_scale);
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tm.SetTranslation(GIZMO_TWO_AXIS_OFFSET,GIZMO_TWO_AXIS_OFFSET,0);
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cci.mat=tm;
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gma->square=render_framework->CreateComponent<MeshComponent>(&cci,SquarePtr);
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gma->square->SetOverrideMaterial(gma->mi);
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}
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{
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gma=axis+size_t(AXIS::X);
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gma->mi=GetGizmoMI3D(GizmoColor::Red);
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tm.SetScale(cylinder_scale);
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tm.SetRotation(AxisVector::Y,90);
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tm.SetTranslation(GIZMO_CYLINDER_OFFSET,0,0);
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cci.mat=tm;
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gma->cylinder=render_framework->CreateComponent<MeshComponent>(&cci,CylinderPtr); //X 向右圆柱
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gma->cylinder->SetOverrideMaterial(gma->mi);
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tm.SetScale(one_scale);
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tm.SetTranslation(GIZMO_CONE_OFFSET,0,0);
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cci.mat=tm;
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gma->cone=render_framework->CreateComponent<MeshComponent>(&cci,ConePtr); //Z 向上圆锥
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gma->cone->SetOverrideMaterial(gma->mi);
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tm.SetScale(square_scale);
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tm.SetTranslation(0,GIZMO_TWO_AXIS_OFFSET,GIZMO_TWO_AXIS_OFFSET);
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cci.mat=tm;
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gma->square=render_framework->CreateComponent<MeshComponent>(&cci,SquarePtr);
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gma->square->SetOverrideMaterial(gma->mi);
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}
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{
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gma=axis+size_t(AXIS::Y);
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gma->mi=GetGizmoMI3D(GizmoColor::Green);
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tm.SetScale(cylinder_scale);
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tm.SetRotation(AxisVector::X,-90);
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tm.SetTranslation(0,GIZMO_CYLINDER_OFFSET,0);
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cci.mat=tm;
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gma->cylinder=render_framework->CreateComponent<MeshComponent>(&cci,CylinderPtr); //X 向右圆柱
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gma->cylinder->SetOverrideMaterial(gma->mi);
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tm.SetScale(one_scale);
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tm.SetTranslation(0,GIZMO_CONE_OFFSET,0);
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cci.mat=tm;
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gma->cone=render_framework->CreateComponent<MeshComponent>(&cci,ConePtr); //Z 向上圆锥
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gma->cone->SetOverrideMaterial(gma->mi);
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tm.SetScale(square_scale);
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tm.SetTranslation(GIZMO_TWO_AXIS_OFFSET,0,GIZMO_TWO_AXIS_OFFSET);
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cci.mat=tm;
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gma->square=render_framework->CreateComponent<MeshComponent>(&cci,SquarePtr);
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gma->square->SetOverrideMaterial(gma->mi);
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}
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}
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return(true);
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}
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bool OnMove(const Vector2i &mouse_coord) override
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{
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CameraControl *cc=GetCameraControl();
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if(!cc)
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return(false);
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Ray ray;
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cc->SetMouseRay(&ray,mouse_coord);
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Matrix4f l2w=GetLocalToWorldMatrix();
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Vector3f center=TransformPosition(l2w,Vector3f(0,0,0));
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Vector3f start;
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Vector3f end;
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Vector3f p_ray,p_ls;
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float dist;
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float pixel_per_unit;
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float center_ppu;
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center_ppu=cc->GetPixelPerUnit(center); //求原点坐标相对屏幕空间象素的缩放比
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for(int i=0;i<3;i++)
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{
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start=TransformPosition(l2w,GetAxisVector(AXIS(i))*GIZMO_CENTER_SPHERE_RADIUS*center_ppu); //将轴的起点转换到世界坐标
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end=TransformPosition(l2w,GetAxisVector(AXIS(i))*(GIZMO_CENTER_SPHERE_RADIUS+GIZMO_CONE_LENGTH+GIZMO_CYLINDER_HALF_LENGTH)*center_ppu);
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//求射线与线段的最近点
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ray.ClosestPoint(p_ray, //射线上的点
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p_ls, //线段上的点
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start,end); //线段
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dist=glm::distance(p_ray,p_ls); //计算射线与线段的距离
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//求p_ls坐标相对屏幕空间象素的缩放比
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pixel_per_unit=cc->GetPixelPerUnit(p_ls);
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MaterialInstance *mi=dist<GIZMO_CYLINDER_RADIUS*pixel_per_unit?pick_mi:axis[i].mi;
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axis[i].cylinder->SetOverrideMaterial(mi);
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axis[i].cone->SetOverrideMaterial(mi);
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//std::cout<<"Mouse: "<<mouse_coord.x<<","<<mouse_coord.y<<std::endl;
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//std::cout<<"Ray(Ori): "<<ray.origin.x<<","<<ray.origin.y<<","<<ray.origin.z<<")"<<std::endl;
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//std::cout<<"Ray(Dir): "<<ray.direction.x<<","<<ray.direction.y<<","<<ray.direction.z<<")"<<std::endl;
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//std::cout<<"Distance: "<<dist<<std::endl;
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}
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return false;
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}
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};//class GizmoMoveNode:public SceneNode
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static GizmoMoveNode *sn_gizmo_move=nullptr;
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}//namespace
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SceneNode *GetGizmoMoveNode()
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{
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return sn_gizmo_move;
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}
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void ClearGizmoMoveNode()
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{
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SAFE_CLEAR(sn_gizmo_move);
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}
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bool InitGizmoMoveNode(RenderFramework *render_framework)
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{
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if(sn_gizmo_move)
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return(false);
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sn_gizmo_move=new GizmoMoveNode;
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if(!sn_gizmo_move->CreateGizmoGeometry(render_framework))
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{
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delete sn_gizmo_move;
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sn_gizmo_move=nullptr;
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return(false);
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}
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return(true);
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}
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VK_NAMESPACE_END
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