EDIT: Since this post, I’ve decided to finally create my own, self hosted website which you can find here. Check it out for my latest work and tutorials.
Hey everyone, and welcome to my new blog! My blogspot site has served me well over the last few years, but it’s time to move on. Let’s face it, blogger bogs don’t have the most beautiful themes and the lack of flexibility is often frustrating. As I write more tutorials and publish more videos, I am looking for a permanent home to my work, and wordpress is the answer.
I am still deciding whether to host my own, custom domain with wordpress.org, but I’ll be sure to post an update here as, and when, that happens.
I have been making sphere panoramas with a new android update, which I will be posting here as I make them. Feel free to use them as long as you credit this blog: Leake Street, authorised graffiti tunnel in London:
You’ll notice a few things. Apart from the basic setup with camera, sun lamp, and a ground plane you’ll see:
A pile of planks in the middle (which you’ll notice are 2 separate objects if you try to select them)
A single plank next to them which should be green
A weird contraption in front of them
If you press Ctrl-A to animate, the ball will fire forwards and the green plank will fall. The ball will collide with the ground plane but go straight through the planks in the middle
We will come to these one by one, but let’s start with the planks in the middle that will form our building. Each object is a “sheet” of planks. Let’s select the bottom one and open the modifiers tab, where you should see 3 array modifiers.
For this video I want to make a tall, thinner tower. So lower “count” in the first array (“Array Length”) to 5, and in the second array (“Array Width”) to 2. Do this for both “sheets”.
From top view (NumPad 7), it should look like this:
Now for the height. If you scroll down you’ll see a third array modifier, “Array Height” which increases the height of the tower. It doesn’t matter what you increase this by as long as you do the same for both objects. I will set it to 20, which should give me a tower that looks like this:
Now to add the physics. First, we need to separate the planks we’ve created with the array modifier into different objects. Select the first object, and apply all the modifiers by clicking “apply”. Next, go into edit mode (Tab) and hit “a” twice to select all vertices. Now press “p” to separate, which should reveal a drop-down box with an option to separate “by loose parts”. Clicking this will make each plank a separate object. Repeat this step for the second plank object.
The green plank next to them is a plank which has the correct game physics properties assigned to it. Now you can select all the planks in the tower (go into top view, press “b” and drag a box around the tower), and press “add active” in the rigid body tab on the left. Now simply select the green plank while holding shift (this adds it to the selection) and click “copy from active” on the left, which will apply these settings to all of them:
If you can’t see this toolbar press “t”. In older versions of Blender (before 2.7) there might not be tabs like this but there will still be a section for rigid body tools which will have the “copy from active” option.
If you press Ctrl-A now the Keva blocks will all move, but they will behave very strangely. This is because the origins are in the wrong place, which should be fixed. Select all the blocks in the tower again and press Shift Ctrl Alt C. In the drop-down menu that comes up press “origin to geometry” which should correct all the origins to the right place in the middle of their blocks.
Pressing Ctrl-A now should give you a working simulation! The ball should fire at the building and knock it over. However you might notice some of the blocks on the top layer falling off the side, and the building might be a bit bouncy. Let’s fix the blocks falling off, which is caused by the outer layer not being aligned.
If you go into top view you’ll notice the outermost layers hang over the edge. We need to fix these manually. Select the blocks hanging over the right with “b”:
Now move them 1/3 of a unit left by pressing “g” then “x” (to move it on the x-axis) then “3”, “/”, and “-” to move it the reciprocal of 3, or 1/3, left. Do this for all other planks hanging over the top, left and bottom edges. Remember to use move the top and bottom ones in the “y” direction.
What it should look like when everything is lined up
Pressing Ctrl-A now will give a completely stable simulation, with nothing falling off the sides! Be patient, this might be very slow. If you have built a much bigger building it might still be bouncy, which can be fixed by enabling “start deactivated” which means the building objects are only affected by physics once they make a collision with something. This can be done in the simulation tab in properties, under rigid body dynamics. First tick “enable deactivation” then tick “start deactivated”. This will however only apply it to the currently active selected object and to copy these setting to all of them you will need to use the “copy from active” box we have used before.
We’re done! I used this template to make the majority of the Kapla / Keva clips in my video. If you make something cool, let me know in a message on YouTube or a comment on this blog. If you would like me to use it in future compilations I make, make sure to upload it as “creative commons” and I will be able to use it and give credit. Just as a final tip, a lot of problems can be solved by increasing the “solver iterations” in the scene tab. If things are unstable, your tower is bouncy, things are falling when they shouldn’t, or things are going through the ground plane, this can usually be solved by increasing the iterations.
Besides Blender, I have been working on Android mobile app development. I am still very new to this field, and to programming in general so everything I’ve made so far is, let’s say, very simple. My latest app is a rowing split time calculator to calculate distance, time or average pace for rowing when the other two values are input.
Miniature faking, sometimes used synonymously with tilt-shift, is a way of making life-size things look like scale models. It works by simulating the shallow depth of field found in macro photography. Here is a selection of pictures I have added a tilt shift effect to in Blender: