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Cycles: Save one transform inversion in the camera sync

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Summary: By calculating the Camera-to-Screen-Matrix first, one inversion can be saved in the Camera sync.
It won't really improve speed and/or precision, it's mainly a small cleanup.

Reviewers: sergey, dingto

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This commit is contained in:
Lukas Stockner 2015-11-21 22:14:13 +01:00
parent f547bf2f10
commit 5c5df9dc18
1 changed files with 5 additions and 5 deletions
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10
intern/cycles/render/camera.cpp
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@ -150,7 +150,6 @@ void Camera::update()
Transform bordertofull = transform_inverse(fulltoborder);
/* ndc to raster */
Transform screentocamera;
Transform ndctoraster = transform_scale(width, height, 1.0f) * bordertofull;
/* raster to screen */
@ -160,14 +159,15 @@ void Camera::update()
Transform rastertoscreen = transform_inverse(screentoraster);
/* screen to camera */
Transform cameratoscreen;
if(type == CAMERA_PERSPECTIVE)
screentocamera = transform_inverse(transform_perspective(fov, nearclip, farclip));
cameratoscreen = transform_perspective(fov, nearclip, farclip);
else if(type == CAMERA_ORTHOGRAPHIC)
screentocamera = transform_inverse(transform_orthographic(nearclip, farclip));
cameratoscreen = transform_orthographic(nearclip, farclip);
else
screentocamera = transform_identity();
cameratoscreen = transform_identity();
Transform cameratoscreen = transform_inverse(screentocamera);
Transform screentocamera = transform_inverse(cameratoscreen);
rastertocamera = screentocamera * rastertoscreen;
cameratoraster = screentoraster * cameratoscreen;