Math and Matrix with OpenGLES on RaspberryPi2

[seanshpark]

Problem: how to do matrix calculation with shader?

[seanshpark]

Readings...

• http://glslstudio.com/primer/
• https://developer.apple.com/library/prerelease/content/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/TechniquesforWorkingwithVertexData/TechniquesforWorkingwithVertexData.html
• https://www.raywenderlich.com/3664/opengl-tutorial-for-ios-opengl-es-2-0
• https://www.raywenderlich.com/70208/opengl-es-pixel-shaders-tutorial

Khronos

• https://www.khronos.org/registry/OpenGL/specs/es/

Reference

• https://www.khronos.org/registry/OpenGL-Refpages/es2.0/

[seanshpark]

EGL

• in RPi2, /opt/vc/include/EGL, Version 1.4
• https://www.khronos.org/registry/EGL/sdk/docs/man/

[seanshpark]

https://github.com/mn416/QPULib http://www.codedivine.org/2014/03/03/broadcom-videocore-iv-architecture-overview/

https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2835/README.md

• https://docs.broadcom.com/docs/12358545 (VideoCoreIV-AG100-R.pdf)

[seanshpark]

GPU mem with 64M

$ vcgencmd get_mem gpu
gpu=64M

$ free
              total        used        free      shared  buff/cache   available
Mem:         947732       38640      541268       13020      367824      837860
Swap:             0           0           0

to 256MB

$ vcgencmd get_mem gpu
gpu=256M

$  free
              total        used        free      shared  buff/cache   available
Mem:         752852       40252      510236       10588      202364      642180
Swap:             0           0           0

[seanshpark]

Moving to https://github.com/seanshpark/bpnqpu/issues