Monthly Archive: July 2009

Graph - Annual Temperatures (Java)

Open /scripts/data-visualisation/graph-annual-temperatures-java

This graph is an experiment with the use Java applets to provide highly interactive charts and graphs embedded within a web page. It is just an example so the data it shows is not hugely meaningful - in this case a set of annual hourly air temperature values. However, it is an opportunity to play with my primitive attempt at an interactive and intuitive date range control. This control sits at the bottom of the chart and provides a means for selecting a date range for the values shown.

Weather Data

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The terms climate data and weather data are often used interchangeably, however there is a subtle but quite important difference between them. When we refer to weather, we typically mean the actual conditions being experienced at a particular time or over a particular period.

How Can I Calculate the Analysis Grid Area ?

How would I go about calculating the area of the analysis grid that is above a given threshold value. I know I can find the percentage of all points above it, but I need the actual floor-area and preferably very accurately.

This Ecotect script demonstrates how to iterate over the current analysis grid in your model and calculate the actual surface area that is above a given threshold, in this case the current minimum scale value. Whilst Ecotect can already show the percentage of grid points above a threshold, this script includes the fractional areas of cells that are partially above and partially below.

What are the red and blue arcs on the annual sun-path ?

When you overlay an Annual Sun-Path Diagram on the model in the VISUALISE page, two additional red and blue arcs appear that are not displayed in any of the other Sun-Path diagram views. What do they show ?

These arcs represent the range of azimuth angles that the Sun travels through in Summer and Winter. The aim in showing these arcs is to highlight the seasonal differences and allow the designer to quickly understand and, hopefully, take advantage of them.

Climate Data

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The terms climate data and weather data are often used interchangeably, however there is a subtle but quite important difference between them. When we refer to climate, we typically mean the type of conditions we would expect to experience or that are most likely to occur. Thus, whilst the weather on a particular day may be described as hot and dry, that does not stop the climate at that location being described as cold and wet. What determines the climate is the long-term average of short-term weather conditions.

Why is my outdoor area seemingly always in shade?

When I create an object on the ground to investigate shading, why is it apparently always 100% in shade and its shading mask completely black?

When you create an object in Ecotect, it tries to be a bit intuitive in working out what you intended. If you create a planar surface on the ground plane, Ecotect assumes that you want this to be a floor beneath other geometry. Thus it assigns it as a FLOOR object with it's surface normal facing downwards. As a result, it will always be in shade as it faces the ground.

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Research Interests and Personal Projects

This page lays out the basic topics and idealogical structure of this site - listing the things that I experiment with in my spare time. Working now at Autodesk in the AEC Simulation division doesn't leave me much of that, but I do still like to tinker...

Experimental Page Layouts/Formatting

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In my experiments with CSS and Javascript to create a range of different formating options and layouts, I need a test page to see if I have broken anything with recent changes. This is that page...