Chair using CraftML tags

README.md

title	author
Making a Chair	Caleb Hsu

Objective: Make a chair with adjustable length and leg height.

Start by making the seat of the chair. We can add parameters after we have determined our dimensions.

<craft>
    <cube size="15 15 2"></cube>
</craft>

Next, make the back of the seat by spacing two supports with <col>. To make the rounded back, <stack> and a <cylinde>r over a sized <cube>, then combine with the supports using <stack>.

<craft>
    <stack spacing="-13">
        <stack spacing="-4">
            <cylinder height="1" radius="6" transform="
                rotateY(90)
            "></cylinder>
            <cube size="1 11 7.5"></cube>
        </stack>
            
        <col spacing="11">
            <repeat n="2">
                <cube size="2 2 15"></cube>
            </repeat>    
        </col>
    </stack>
</craft>

Finally, make the legs by using <col> and <repeat> on a group <g> of two legs and a horizontal support. Consider how spacing and size affect their relation to the width and length of the seat.

<craft>
    <col spacing="11">
        <repeat n="2">
            <g layout="lineupX() alignZ(20%)">
                <cube size="2 2 14"></cube>     
                <cube size="11 1.5 1.5"></cube>
                <cube size="2 2 14"></cube>
            </group>
        </repeat>
    </col>
</craft>

Group and layout the legs, seat, and back together, using the align, lineup and center functions.

<craft>
    <g layout="alignX(0%) lineupZ(0) centerY()">
        <stack>
            <cube size="15 15 2"></cube>
            
            <col spacing="11">
                <repeat n="2">
                    <g layout="lineupX() alignZ(20%)">
                        <cube size="2 2 14"></cube>     
                        <cube size="11 1.5 1.5"></cube>
                        <cube size="2 2 14"></cube>
                    </group>
                </repeat>
            </col>
        </stack>
        
        <stack spacing="-13">
            <stack spacing="-4">
                <cylinder height="1" radius="6" transform="
                    rotateY(90)
                "></cylinder>
                <cube size="1 11 7.5"></cube>
            </stack>
            
            <col spacing="11">
                <repeat n="2">
                    <cube size="2 2 15"></cube>
                </repeat>    
            </col>
        </stack>
    </g>
</craft>

Now that we've finalized our dimensions, parameterize seat length and leg height.

<craft name="chair">
    <parameter name="length" type="int" default="15"/>
    <parameter name="legHeight" type="int" default="14"/>
    
    <stack layout="alignX(0%)" color="peru">
        <stack spacing="-13">
            <stack spacing="-4">
                <cylinder height="1" radius="6" 
                    transform="rotateY(90)
                "></cylinder>
                <cube size="1 11 7.5"></cube>
            </stack>
            
            <col spacing="11">
                <repeat n="2">
                    <cube size="2 2 15"></cube>
                </repeat>    
            </col>
        </stack>
        
        <stack>
            <cube size="{{length}} 15 2"></cube>

            <col spacing="11">
                <repeat n="2">
                    <row layout="alignZ(20%)">
                        <cube size="2 2 {{legHeight}}"></cube>     
                        <cube size="{{length - 4}} 1.5 1.5"></cube>
                        <cube size="2 2 {{legHeight}}"></cube>
                    </row>
                </repeat>
            </col>
        </stack>
    </stack>
    
</craft>

index.xml

<craft name="chair">
    <parameter name="length" type="int" default="15"/>
    <parameter name="legHeight" type="int" default="14"/>
    
    <stack layout="alignX(0%)" color="peru">
        <!-- Back -->
        <stack spacing="-13">
            <stack spacing="-4">
                <cylinder height="1" radius="6" 
                    transform="rotateY(90)
                "></cylinder>
                <cube size="1 11 7.5"></cube>
            </stack>
            
            <col spacing="11">
                <repeat n="2">
                    <cube size="2 2 15"></cube>
                </repeat>    
            </col>
        </stack>
        
        <stack>
            <!-- Seat -->
            <cube size="{{length}} 15 2"></cube>
            
            <!-- Legs -->
            <col spacing="11">
                <repeat n="2">
                    <row layout="alignZ(20%)">
                        <cube size="2 2 {{legHeight}}"></cube>     
                        <cube size="{{length - 4}} 1.5 1.5"></cube>
                        <cube size="2 2 {{legHeight}}"></cube>
                    </row>
                </repeat>
            </col>
        </stack>
    </stack>
    
</craft>