updatewindow

using GLPlot

xx=[1 2 3 4;
1 2 3 4;
1 2 3 4];
yy=[2 2 2 2;4 4 4 4;6 6 6 6]
vals=ones(3,4)

colorf(m)="xyz.z>0 ? vec4(.2,.4,0.5+"string(m)"*xyz.z,0.98) : vec4(.2,.4-"*string(1.2m)"*xyz.z,0.5,0.98);" # <- forgot *
function glupdatewindow(obj,window)
yield() # <- I notice, that yield should come first

ModernGL.glClear(ModernGL.GL_COLOR_BUFFER_BIT | ModernGL.GL_DEPTH_BUFFER_BIT)
GLAbstraction.render(obj)
Main.GLFW.SwapBuffers(window.glfwWindow)

Main.GLFW.PollEvents()

obj,window

end
window = GLPlot.createdisplay(w=1000,h=1000,eyeposition=GLAbstraction.Vec3(1.,1.,1.), lookat=GLAbstraction.Vec3(0.,0.,0.))
m=0.5./maximum(abs(vals))

ModernGL.glClearColor(1,1,1,0)
obj = GLPlot.glplot(map(GLAbstraction.Vec1,vals) , xrange=float32(xx),yrange=float32(yy),primitive=GLPlot.SURFACE(), color=colorf(m))

glupdatewindow(obj,window)
zvalues = obj.uniforms[:z]
zvalues[1:2, 1:2] = float32(vals[1:2,1:2]*=2)


glupdatewindow(obj,window);

renderloop(window)