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Coordinate system

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nakayama	nakayama posted 5 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 72, Visits: 408	Hi, 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+300cos(0.174533)) / circle_b=1px(expressions.circle_y+300sin(0.174533)) Thank you ;)
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nakayama	nakayama posted 5 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 72, Visits: 408	+x nakayama - 11/5/2019 Hi, 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+300cos(0.174533)) / circle_b=1px(expressions.circle_y+300sin(0.174533)) Thank you ;) *(960, 1000) is (x,y)
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Dave	Dave posted 5 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	+x nakayama - 11/6/2019 +x nakayama - 11/5/2019 Hi, 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+300cos(0.174533)) / circle_b=1px(expressions.circle_y+300sin(0.174533)) Thank you ;) (960, 1000) is (x,y) <expressions> / theta = (values.angle)(m_pi/180) / deltax = values.radiuscos(expressions.theta) / deltay = values.radiussin(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>
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