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EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews.SAMPLE PROGRAMS
About Gameduino. Gameduino is a game adapter for Arduino - or anything else with an SPI interface - built as a single shield that stacks up on top of the Arduino and RESOURCES - EXCAMERA Follow @gameduino on twitter. Gameduino 3X adds a bright touchscreen to the Arduino. It features amazing graphics, audio and video from the FT815 GPU -- right in your hand. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using A POWER OVER ETHERNET (POE) EXTRACTOR This is a PoE (power over ethernet) extractor with a DC-DC converter. You plug in a cable carrying data and 48VDC, and you get a clean, regulated 5VDC output and a standard RJ45 jack. I designed the board with Cadsoft's Eagle: the schematic, layout and Postscipt are all here.. This board uses the Cisco wiring model (positive power on pairs 7,8, negative power on pairs 4,5). A REASONABLY SPEEDY PYTHON RAY-TRACER In the first version x and y are scalar values, and raytrace() runs 120,000 times. But in the second version x and y are NumPy arrays, each 120,000 values long, and raytrace() runs once. Because running Python code is quite slow, and NumPy's array operations are really fast, the speedup is huge.. NumPy lets you operate on arrays with no special syntax, so the actual definition of raytrace MULTI-PASS RENDERING IN OPENGL Multi-pass texturing in OpenGL Introduction. This short example demonstrates how you can use a combination of OpenGL blend modes andmultiple passes to
GAMEDUINO: GETTING STARTED With the Arduino IDE. The Gameduino library supports Gameduino 2, 3 and 3X -- it auto-detects the attached board at startup. The library is tested with Arduino, ESP8266 and Teensy controllers. XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one.EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews.SAMPLE PROGRAMS
About Gameduino. Gameduino is a game adapter for Arduino - or anything else with an SPI interface - built as a single shield that stacks up on top of the Arduino and RESOURCES - EXCAMERA Follow @gameduino on twitter. Gameduino 3X adds a bright touchscreen to the Arduino. It features amazing graphics, audio and video from the FT815 GPU -- right in your hand. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using A POWER OVER ETHERNET (POE) EXTRACTOR This is a PoE (power over ethernet) extractor with a DC-DC converter. You plug in a cable carrying data and 48VDC, and you get a clean, regulated 5VDC output and a standard RJ45 jack. I designed the board with Cadsoft's Eagle: the schematic, layout and Postscipt are all here.. This board uses the Cisco wiring model (positive power on pairs 7,8, negative power on pairs 4,5). A REASONABLY SPEEDY PYTHON RAY-TRACER In the first version x and y are scalar values, and raytrace() runs 120,000 times. But in the second version x and y are NumPy arrays, each 120,000 values long, and raytrace() runs once. Because running Python code is quite slow, and NumPy's array operations are really fast, the speedup is huge.. NumPy lets you operate on arrays with no special syntax, so the actual definition of raytrace MULTI-PASS RENDERING IN OPENGL Multi-pass texturing in OpenGL Introduction. This short example demonstrates how you can use a combination of OpenGL blend modes andmultiple passes to
GAMEDUINO: GETTING STARTED With the Arduino IDE. The Gameduino library supports Gameduino 2, 3 and 3X -- it auto-detects the attached board at startup. The library is tested with Arduino, ESP8266 and Teensy controllers. XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one.STORE - EXCAMERA
Store. Shipping via USPS First Class (1-3 days) is free on all U.S. orders, $9.99 for international orders. Orders placed before 4pm US Pacific time ship same day. Contents. SPIDriver: $29.00. SPIDriver Expert pack: $59.00. I²CDriver: $29.00. I²CMini 3-pack: $42.00. Gameduino 3X: $38.99. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using RESOURCES - EXCAMERA About Gameduino 2. Gameduino 2 is a shield that adds a bright 4.3 inch touchscreen, an embedded GPU, headphone jack, accelerometer and microSD slot to your Arduino - or anything else with an SPI interface. PYFICL - A PYTHON INTERFACE TO FICL Introduction¶. The FICL package is a Forth implementation with a very comprehensive C interface.. This module implements a Python interface to FICL. You can use it to call Forth from PythonVIEWER - EXCAMERA
Live. •. This is a simple viewer application that scans the microSD card for files with a JPG suffix, and presents a scrolling menu, so you can choose an image. It then loads the JPEG using cmd_loadimage. Touching the screen highlights circular areas. MULTI-PASS RENDERING IN OPENGL Multi-pass texturing in OpenGL Introduction. This short example demonstrates how you can use a combination of OpenGL blend modes andmultiple passes to
XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
VISUALIZING OVERDRAW VIA STENCIL IN OPENGL Look at the source for dinodraw.c. Download the source. Download Windows 95/Windows NT executable How it works. The algorithm uses four passes. The first pass drawns the scene as usual, but increments stencil value for every pixel drawn (regardless of whether it passesthe depth test).
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one. USING 320X480 PANELS WITH THE GD LIBRARY Using 320x480 panels with the GD library. There are a lot of 320x480 (HVGA) LCD panels based on the ILI9488 controller. This panel was originally used by smartphones a few years ago, which explains its abundance and unusual "portrait" aspect ratio.EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews.SAMPLE PROGRAMS
About Gameduino. Gameduino is a game adapter for Arduino - or anything else with an SPI interface - built as a single shield that stacks up on top of the Arduino and RESOURCES - EXCAMERA Follow @gameduino on twitter. Gameduino 3X adds a bright touchscreen to the Arduino. It features amazing graphics, audio and video from the FT815 GPU -- right in your hand. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using A POWER OVER ETHERNET (POE) EXTRACTOR This is a PoE (power over ethernet) extractor with a DC-DC converter. You plug in a cable carrying data and 48VDC, and you get a clean, regulated 5VDC output and a standard RJ45 jack. I designed the board with Cadsoft's Eagle: the schematic, layout and Postscipt are all here.. This board uses the Cisco wiring model (positive power on pairs 7,8, negative power on pairs 4,5). A REASONABLY SPEEDY PYTHON RAY-TRACER In the first version x and y are scalar values, and raytrace() runs 120,000 times. But in the second version x and y are NumPy arrays, each 120,000 values long, and raytrace() runs once. Because running Python code is quite slow, and NumPy's array operations are really fast, the speedup is huge.. NumPy lets you operate on arrays with no special syntax, so the actual definition of raytrace MULTI-PASS RENDERING IN OPENGL Multi-pass texturing in OpenGL Introduction. This short example demonstrates how you can use a combination of OpenGL blend modes andmultiple passes to
GAMEDUINO: GETTING STARTED With the Arduino IDE. The Gameduino library supports Gameduino 2, 3 and 3X -- it auto-detects the attached board at startup. The library is tested with Arduino, ESP8266 and Teensy controllers. XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one.EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews.SAMPLE PROGRAMS
About Gameduino. Gameduino is a game adapter for Arduino - or anything else with an SPI interface - built as a single shield that stacks up on top of the Arduino and RESOURCES - EXCAMERA Follow @gameduino on twitter. Gameduino 3X adds a bright touchscreen to the Arduino. It features amazing graphics, audio and video from the FT815 GPU -- right in your hand. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using A POWER OVER ETHERNET (POE) EXTRACTOR This is a PoE (power over ethernet) extractor with a DC-DC converter. You plug in a cable carrying data and 48VDC, and you get a clean, regulated 5VDC output and a standard RJ45 jack. I designed the board with Cadsoft's Eagle: the schematic, layout and Postscipt are all here.. This board uses the Cisco wiring model (positive power on pairs 7,8, negative power on pairs 4,5). A REASONABLY SPEEDY PYTHON RAY-TRACER In the first version x and y are scalar values, and raytrace() runs 120,000 times. But in the second version x and y are NumPy arrays, each 120,000 values long, and raytrace() runs once. Because running Python code is quite slow, and NumPy's array operations are really fast, the speedup is huge.. NumPy lets you operate on arrays with no special syntax, so the actual definition of raytrace MULTI-PASS RENDERING IN OPENGL Multi-pass texturing in OpenGL Introduction. This short example demonstrates how you can use a combination of OpenGL blend modes andmultiple passes to
GAMEDUINO: GETTING STARTED With the Arduino IDE. The Gameduino library supports Gameduino 2, 3 and 3X -- it auto-detects the attached board at startup. The library is tested with Arduino, ESP8266 and Teensy controllers. XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one.STORE - EXCAMERA
Store. Shipping via USPS First Class (1-3 days) is free on all U.S. orders, $9.99 for international orders. Orders placed before 4pm US Pacific time ship same day. Contents. SPIDriver: $29.00. SPIDriver Expert pack: $59.00. I²CDriver: $29.00. I²CMini 3-pack: $42.00. Gameduino 3X: $38.99. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using RESOURCES - EXCAMERA About Gameduino 2. Gameduino 2 is a shield that adds a bright 4.3 inch touchscreen, an embedded GPU, headphone jack, accelerometer and microSD slot to your Arduino - or anything else with an SPI interface. PYFICL - A PYTHON INTERFACE TO FICL Introduction¶. The FICL package is a Forth implementation with a very comprehensive C interface.. This module implements a Python interface to FICL. You can use it to call Forth from PythonVIEWER - EXCAMERA
Live. •. This is a simple viewer application that scans the microSD card for files with a JPG suffix, and presents a scrolling menu, so you can choose an image. It then loads the JPEG using cmd_loadimage. Touching the screen highlights circular areas. MULTI-PASS RENDERING IN OPENGL Multi-pass texturing in OpenGL Introduction. This short example demonstrates how you can use a combination of OpenGL blend modes andmultiple passes to
XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
VISUALIZING OVERDRAW VIA STENCIL IN OPENGL Look at the source for dinodraw.c. Download the source. Download Windows 95/Windows NT executable How it works. The algorithm uses four passes. The first pass drawns the scene as usual, but increments stencil value for every pixel drawn (regardless of whether it passesthe depth test).
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one. USING 320X480 PANELS WITH THE GD LIBRARY Using 320x480 panels with the GD library. There are a lot of 320x480 (HVGA) LCD panels based on the ILI9488 controller. This panel was originally used by smartphones a few years ago, which explains its abundance and unusual "portrait" aspect ratio.STORE - EXCAMERA
Store. Shipping via USPS First Class (1-3 days) is free on all U.S. orders, $9.99 for international orders. Orders placed before 4pm US Pacific time ship same day. Contents. SPIDriver: $29.00. SPIDriver Expert pack: $59.00. I²CDriver: $29.00. I²CMini 3-pack: $42.00. Gameduino 3X: $38.99.EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews.SAMPLE PROGRAMS
About Gameduino. Gameduino is a game adapter for Arduino - or anything else with an SPI interface - built as a single shield that stacks up on top of the Arduino and RESOURCES - EXCAMERA Follow @gameduino on twitter. Gameduino 3X adds a bright touchscreen to the Arduino. It features amazing graphics, audio and video from the FT815 GPU -- right in your hand. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using A POWER OVER ETHERNET (POE) EXTRACTOR This is a PoE (power over ethernet) extractor with a DC-DC converter. You plug in a cable carrying data and 48VDC, and you get a clean, regulated 5VDC output and a standard RJ45 jack. I designed the board with Cadsoft's Eagle: the schematic, layout and Postscipt are all here.. This board uses the Cisco wiring model (positive power on pairs 7,8, negative power on pairs 4,5). GAMEDUINO: GETTING STARTED With the Arduino IDE. The Gameduino library supports Gameduino 2, 3 and 3X -- it auto-detects the attached board at startup. The library is tested with Arduino, ESP8266 and Teensy controllers. FORTH LOOP INVERSION Forth loop inversion. A "while" loop in C: while (condition) body (); has the Forth equivalent: begin condition while body repeat. This compiles as a loop with two jumps the the body. The first jump is the conditional forward branch, and the second is the unconditional backwards branch. So for a hypothetical CPU we might get thisinstruction
XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one.STORE - EXCAMERA
Store. Shipping via USPS First Class (1-3 days) is free on all U.S. orders, $9.99 for international orders. Orders placed before 4pm US Pacific time ship same day. Contents. SPIDriver: $29.00. SPIDriver Expert pack: $59.00. I²CDriver: $29.00. I²CMini 3-pack: $42.00. Gameduino 3X: $38.99.EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews.SAMPLE PROGRAMS
About Gameduino. Gameduino is a game adapter for Arduino - or anything else with an SPI interface - built as a single shield that stacks up on top of the Arduino and RESOURCES - EXCAMERA Follow @gameduino on twitter. Gameduino 3X adds a bright touchscreen to the Arduino. It features amazing graphics, audio and video from the FT815 GPU -- right in your hand. J1A SWAPFORTH BUILT WITH ICESTORM J1a SwapForth built with IceStorm. Project IceStorm aims to reverse engineer some Lattice FPGAs, and provides a working tool chain for synthesizing designs and downloading them into the hardware.. The J1a CPU is a minimal 16-bit Verilog CPU, fits easily on the Lattice HX20-1K on the Lattice iCEstick evaluation board.After some help from the people at project IceStorm, it is now buildable using A POWER OVER ETHERNET (POE) EXTRACTOR This is a PoE (power over ethernet) extractor with a DC-DC converter. You plug in a cable carrying data and 48VDC, and you get a clean, regulated 5VDC output and a standard RJ45 jack. I designed the board with Cadsoft's Eagle: the schematic, layout and Postscipt are all here.. This board uses the Cisco wiring model (positive power on pairs 7,8, negative power on pairs 4,5). GAMEDUINO: GETTING STARTED With the Arduino IDE. The Gameduino library supports Gameduino 2, 3 and 3X -- it auto-detects the attached board at startup. The library is tested with Arduino, ESP8266 and Teensy controllers. FORTH LOOP INVERSION Forth loop inversion. A "while" loop in C: while (condition) body (); has the Forth equivalent: begin condition while body repeat. This compiles as a loop with two jumps the the body. The first jump is the conditional forward branch, and the second is the unconditional backwards branch. So for a hypothetical CPU we might get thisinstruction
XORSHIFT RNGS FOR SMALL SYSTEMS Xorshift RNGs for small systems. "Xorshift RNGs" by George Marsaglia describes a very efficient system for generating high-quality random numbers using very little compute and storage. For a simple random number generator running on an embedded CPU we're unlikely to be very concerned with cycle lengths -- a cycle of 2 32 -1 is perfectlyacceptable.
GOSZIFOX: AN OPENGL DISPLAY FOR THE WITTIG OSZIFOX goszifox: an OpenGL display for the Wittig Oszifox. The Wittig Oszifox is a small, cheap, pen-type oscilloscope made by Wittig of Germany. It has a tiny screen built in to it, but I wanted a larger one.STORE - EXCAMERA
Store. Shipping via USPS First Class (1-3 days) is free on all U.S. orders, $9.99 for international orders. Orders placed before 4pm US Pacific time ship same day. Contents. SPIDriver: $29.00. SPIDriver Expert pack: $59.00. I²CDriver: $29.00. I²CMini 3-pack: $42.00. Gameduino 3X: $38.99.EXCAMERA
Excamera. The new Gameduino 3X Dazzler with HD HDMI out, dual Wii controllers, and many other features is now available from Crowd Supply , Amazon and the Excamera Store. The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews. OPENEXR — READ AND WRITE EXR FORMAT IMAGES — PYTHON The following data items and methods are supported: writePixels(dict )¶ Write the specified channels to the OpenEXR image. dict specifies multiple channels. If scanlines is not specified, then the entire image is assumed. dict specifies each channel’s data as channel:data, where channel and data are both strings. This method uses the file’s header to determine the format of INTRODUCTION AND COOKBOOK Introduction and Cookbook¶. OpenEXR is an image format developed by ILM.Its main innovation is support for high dynamic range; it supports floating point pixels. This module provides Python bindings for the OpenEXR C++ libraries.They allow you to read and write OpenEXR filesfrom Python.
COBRA - EXCAMERA
This is an update of the original Gameduino wireframe demo. The background star layer is a seamless 256x256 texture by Patrick Hoesly . It is drawn as a single 480x272 sprite. Patrick also made the 'sun' image. The code draws it twice, rotating in opposite directions, to give it a little shimmer. The Cobra spacecraft model is transformedand
VIEWER - EXCAMERA.COM This is a simple viewer application that scans the microSD card for files with a JPG suffix, and presents a scrolling menu, so you can choose an image. It then loads the JPEG using cmd_loadimage. Touching the screen highlights circular areas. (Note that the JPEG load time is about 0.9s - it is not visible in the video because JPEG loading FORTH LOOP INVERSION Forth loop inversion. A "while" loop in C: while (condition) body (); has the Forth equivalent: begin condition while body repeat. This compiles as a loop with two jumps the the body. The first jump is the conditional forward branch, and the second is the unconditional backwards branch. So for a hypothetical CPU we might get thisinstruction
OPENEXR BINDINGS FOR PYTHON OpenEXR bindings for Python. Download OpenEXR-1.2.0.tar.gz.. OpenEXR is an image format developed by ILM. OpenEXR's main advantage over other image formats is high dynamic range: it USING 320X480 PANELS WITH THE GD LIBRARY Using 320x480 panels with the GD library. There are a lot of 320x480 (HVGA) LCD panels based on the ILI9488 controller. This panel was originally used by smartphones a few years ago, which explains its abundance and unusual "portrait" aspect ratio. For example the ME810A-HV35R module from Bridgetek has an ILI9488 controller, togetherwith an
CHEBYSHEV APPROXIMATION IN PYTHON Chebyshev approximation is covered in Chapter 5.8 of Numerical Recipes in C. Here's a similar implementation in Python: import math class Chebyshev: """ Chebyshev (a, b, n, func) Given a function func, lower and upper limits of the interval , and maximum degree n, this class computes a Chebyshev approximation of the function. The new GAMEDUINO 3X DAZZLER WITH HD HDMI OUT, DUAL WII CONTROLLERS, AND MANY OTHER FEATURES is now available from Crowd Supply, Amazon
and the Excamera Store.
The Excamera Labs newsletter is sent out every Tuesday. In it I talk about the latest projects, launches and previews. You can subscribehere .
Gameduino CircuitPython March 2021 Crossbars in CuFlow February 2021 Forth double loops September 2020 I²CDriver February 2019 SPIDriver August 2018 TermDriver July 2018 Efficient live Hanoi backups January 2018 Circular gradients on FT810 December 2017 Gameduino 3 December 2017 Using 320x480 panels with the GD libraryNovember 2017
Applying batch color corrections to imagesOctober 2017
GA144 note: Native threaded executionSeptember 2017
GA144 note: VGA output August 2017 GA144 note: stack node July 2017 Using BTRFS with loopback for compressed directoriesMay 2017
A reasonably speedy Python ray-tracer June 2016 The ordered dither matrix in Verilog May 2016 CHIP-8: 40 Games on an Arduino Uno September2015
J1a SwapForth built with IceStorm July2015
Xorshift RNGs for small systems August 2014 Forth loop inversion August 2014 GA144 note: one node RAM June 2014 Forth enumerant January 2014 Gameduino 2: this time it’s personalOctober 2013
Overlapping intervals Nov 2011 Broadcaster: driving two identical interfacesMarch 2011
Gameduino: a game adapter for microcontrollersFebruary 2011
Arduino CRC-32 February 2011 Memory-efficient decompression for embedded computersFebruary 2011
Hunt the Wumpus in Forth January 2011 islast: handling the last element of an iteratorJanuary 2011
docforth: a pretty-printer for Forth programsNovember 2010
Only Standard Definitions November 2010 To Know Forth November 2010 Forth bound methods November 2010 Forth i2c words August 2010 pyficl - a Python interface to FICL Apr 2010 Controlling the picoLCD from Python Apr 2010 Leaving files unchanged Mar 2010 Stochastic Histograms Dec 2009 Optimizing conversion between sRGB and linearSept 2009
Chebyshev approximation in Python Sept 2009 Optimizing pow() Sept 2009 OpenEXR bindings for Python June 2007- present
older stuff June 1997 - July 2007 Excamera.com is the writing site of James Bowman.jamesb@excamera.com
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