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In the tutorial Daylighting Simulations with Radiance using Matrix-based Methods (pp. 42), the "view-up" vector of the rfluxmtx hemispherical sampling is set to +Y direction, as in the figure below.
To my understanding, the window of the room model is facing the negative Y direction, which is the "south" direction in Radiance. Then, why is the sampling hemisphere taken to the positive Y direction here? How to understand the definition of the "view-up" vector here?
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In the tutorial Daylighting Simulations with Radiance using Matrix-based Methods (pp. 42), the "view-up" vector of the rfluxmtx hemispherical sampling is set to +Y direction, as in the figure below.
To my understanding, the window of the room model is facing the negative Y direction, which is the "south" direction in Radiance. Then, why is the sampling hemisphere taken to the positive Y direction here? In other words, shouldn't the sampling rays be shot into the negative Y directions to get the daylight matrix?
How to understand the definition of the "view-up" vector here?vector?
. .
In the tutorial Daylighting Simulations with Radiance using Matrix-based Methods (pp. 42), the "view-up" vector of the rfluxmtx hemispherical sampling is set to +Y direction, as in the figure below.
To my understanding, the window of the room model is facing the negative Y direction, which is the "south" direction in Radiance. Then, why is the sampling hemisphere taken to the positive Y direction here? In other words, shouldn't the sampling rays be shot into the negative Y directions to get the daylight matrix?
How to understand the definition of the "view-up" vector?
.
In the tutorial Daylighting Simulations with Radiance using Matrix-based Methods (pp. 42), the "view-up" vector of the rfluxmtx hemispherical sampling is set to +Y direction, as in the figure below.
To my understanding, the window of the room model is facing the negative Y direction, which is the "south" direction in Radiance. Then, why is the sampling hemisphere taken to the positive Y direction here? In other words, shouldn't the sampling rays be shot into the negative Y directions to get the daylight matrix?
How to understand the definition of the "view-up" vector?
.
