| /** Using a faux sphere in screen space, determine the arc transform to orbit | |
| * the camera around a target position. A continuous orientation will | |
| * be provided for further calls. | |
| */ | |
| function arcBallTransform( | |
| scrSize, // Screen size, vec2 | |
| scrPos0, // Starting mouse position, vec2 | |
| scrPos1, // Ending Mouse Positiong, vec2 | |
| rotOrientation, // Current arc orientation, quaternion | |
| targetPos, // Position to orbit around |
| ## Note, this file is written by cloud-init on first boot of an instance | |
| ## modifications made here will not survive a re-bundle. | |
| ## if you wish to make changes you can: | |
| ## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg | |
| ## or do the same in user-data | |
| ## b.) add sources in /etc/apt/sources.list.d | |
| ## c.) make changes to template file /etc/cloud/templates/sources.list.tmpl | |
| # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to | |
| # newer versions of the distribution. |
openwrt opkg install not support specify package version.
ref:
https://stackoverflow.com/a/37938130/4896468
https://forum.openwrt.org/t/opkg-install-a-specific-package-version/33158/21
here is a workgroud to implement install specified version of package with opkg.
principle:
| package main | |
| import ( | |
| "fmt" | |
| "log" | |
| "golang.org/x/sys/unix" | |
| ) | |
| // https://www.gnu.org/software/libc/manual/html_node/Sockets.html#Sockets |
| package main | |
| import ( | |
| "fmt" | |
| "os" | |
| "regexp" | |
| "strings" | |
| ) | |
| type token = string |
| package main | |
| import ( | |
| "context" | |
| "log" | |
| "net" | |
| core "github.com/ipfs/go-ipfs/core" | |
| corerepo "github.com/ipfs/go-ipfs/core/corerepo" | |
| coreunix "github.com/ipfs/go-ipfs/core/coreunix" |
| // ecdh implements a simple way to perform Diffie-Hellman Key Exchange using | |
| // Curve25519 on the command line. | |
| // | |
| // NOTE: this is a toy for fun. Don't use it. | |
| // | |
| // See https://godoc.org/golang.org/x/crypto/curve25519 and | |
| // https://cr.yp.to/ecdh.html for more info. | |
| // | |
| // The final shared secret given is the raw shared secret bytes from DH and is | |
| // not typically suitable for direct use as an encryption key as it can leak |
https://tools.ietf.org/html/draft-pantos-http-live-streaming-23 https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/StreamingMediaGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008332-CH1-SW1
convert any audio to ADTS AAC audio:
ffmpeg \
-i 01-fiery-crash.mp3 \
-vn -ac 2 -acodec aac \
01-fiery-crash.aac| #include <GLFW/glfw3.h> | |
| #include <yoga/Yoga.h> | |
| #include <stdlib.h> | |
| int main(void) | |
| { | |
| GLFWwindow* window; | |
| /* Initialize the library */ | |
| if (!glfwInit()) |
| FROM traefik:camembert | |
| ADD traefik.toml . | |
| EXPOSE 80 | |
| EXPOSE 8080 | |
| EXPOSE 443 |
