+x+xHi, Dave, This maybe an old question. I wish to calculate the coordinate of (a,b) in pixels under the screen resolution of (1960,1200). The angle between is 10 degree. Is there a formula I could refer to? I used something like this but does work. / circle_a=1px*(expressions.circle_x+300*cos(0.174533)) / circle_b=1px*(expressions.circle_y+300*sin(0.174533))
Thank you *(960, 1000) is (x,y) <expressions> / theta = (values.angle)*(m_pi/180) / deltax = values.radius*cos(expressions.theta) / deltay = values.radius*sin(expressions.theta) / a = values.x+expressions.deltax / b = values.y+expressions.deltay </expressions> <values> / x = 960px / y = 1000px / radius = 300px / angle = 10 </values> <shape xy> / shape = circle / size = (40px, 40px) / color = blue / hposition = values.x / vposition = values.y </shape> <shape ab> / shape = circle / size = (40px, 40px) / color = red / hposition = expressions.a / vposition = expressions.b </shape> <trial example> / stimulusframes = [1=xy, ab] / validresponse = (57) </trial>
