x3dom:2.鼠标互动事件（鼠标略过高亮；鼠标点击换色）

系统管理员 2022-02-27 02:42 178阅读 0赞

很多时候，我们需要对模型元素（点线面实体）进行互动，例如装配体中的零件（**实体**）被选中，比如单纯的零件模型选中**点线面**，比如掠过点线面上应该有的高亮效果

![\`][20190401161548217.png]

**效果图：**  
![在这里插入图片描述][20190401160541849.gif]

function highlight(the_shape) // 掠过部分高亮显示
        { 
            // restore color for previous selected shape
            if(drag_state==false) { 
    
                if (current_mat)
                { 
                    current_mat.diffuseColor = selected_target_color;
                }
                // store the shape for future process
                current_selected_shape = the_shape;
                console.log(the_shape);
                // store color, to be restored later
                appear = current_selected_shape.getElementsByTagName("Appearance")[0];
                mat = appear.getElementsByTagName("Material")[0];
                current_mat = mat;
                console.log(mat);
                selected_target_color = mat.diffuseColor;
                mat.emissiveColor = "0, 0, 1";
                //console.log(the_shape.getElementsByTagName("Appearance"));//.getAttribute('diffuseColor'));
            }
        }
    
            function facenormal(the_shape) // 掠出部分回归正常
        { 
            // restore color for previous selected shape
            if(drag_state==false)
            { 
                if (current_mat) { 
                    current_mat.diffuseColor = selected_target_color;
                }
                // store the shape for future process
                current_selected_shape = the_shape;
                console.log(the_shape);
                // store color, to be restored later
                appear = current_selected_shape.getElementsByTagName("Appearance")[0];
                mat = appear.getElementsByTagName("Material")[0];
                current_mat = mat;
                console.log(mat);
                selected_target_color = mat.diffuseColor;
                mat.emissiveColor="1 0 1";
                //console.log(the_shape.getElementsByTagName("Appearance"));//.getAttribute('diffuseColor'));
            }
        }
        function linenormal(the_shape) // 掠出部分回归正常
        { 
            // restore color for previous selected shape
            if(drag_state==false)
            { 
                if (current_mat) { 
                    current_mat.diffuseColor = selected_target_color;
                }
                // store the shape for future process
                current_selected_shape = the_shape;
                console.log(the_shape);
                // store color, to be restored later
                appear = current_selected_shape.getElementsByTagName("Appearance")[0];
                mat = appear.getElementsByTagName("Material")[0];
                current_mat = mat;
                console.log(mat);
                selected_target_color = mat.diffuseColor;
                mat.emissiveColor="1 0 0" ;
                //console.log(the_shape.getElementsByTagName("Appearance"));//.getAttribute('diffuseColor'));
            }
        }

<X3D >
    	<Scene DEF='scene'>
            <NavigationInfo headlight="false" />
    		<Transform DEF='Tube001' translation='0.000000 -0.500000 0.000000' scale='0.874985 1.000000 0.874985' >
    
    		<Group>
    			<Shape onmousemove="highlight(this)" onmouseout="facenormal(this)">
    				<Appearance DEF='_02_-_Default' >
    				<Material diffuseColor="1 0 0" emissiveColor="1 0 1" >
    				</Material>
    				</Appearance>
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    			</Shape>
    
    			<Shape DEF="edg57" onmousemove="highlight(this)" onmouseout="linenormal(this)">
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    			<LineSet vertexCount='2'><Coordinate point='0 0 1 2 6 16 '/></LineSet>
    		</Shape>
    
    		</Group>
    
    		</Transform>
    	</Scene>
    </X3D>

[20190401161548217.png]: /images/20220227/783216a75bb14de9850c70cf331a576d.png
[20190401160541849.gif]: /images/20220227/a37b049f60a94057b8b26fe33fb93a3b.png

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