opticalFlow

This example show how to use the data from optical flow algorithm
from GAmuza Computer Vision panel.

/*
   
 GAmuza 0.4.1 examples
 ---------------------
 ComputerVision/opticalFlow.ga
 
 This example show how to use the data from optical flow algorithm from
 GAmuza videotracking panel.
 
 created by n3m3da | www.d3cod3.org
 
*/

camID = 0
cam = of.texture()

function setup()
    cam:allocate(CAPTURE_W,CAPTURE_H,GL_RGB)
end

function update()
        cam = ga.cameraTexture(0)
end

function draw()
        ga.background(0.0,1.0)
   
        // draw the live image from device
        of.setColor(255)
        cam:draw(0,0,OUTPUT_W,OUTPUT_H)
       
        // draw an optical flow representation
        of.setColor(31,165,210)
        of.setLineWidth(3)
       
        of.pushMatrix()
        of.scale(OUTPUT_W/CAPTURE_W,OUTPUT_H/CAPTURE_H,1)
       
        for i=0, OPTICAL_FLOW_GRID_X*OPTICAL_FLOW_GRID_Y do
                x = ga.camOpticalFlowX(camID,i)
                y = ga.camOpticalFlowY(camID,i)
                vX = ga.camOpticalFlowVX(camID,i)
                vY = ga.camOpticalFlowVY(camID,i)
                of.line(x,y,x + vX,y + vY)
        end
       
        of.popMatrix()

end