blender/intern/cycles/render/camera.cpp

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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "camera.h"
#include "scene.h"
#include "util_vector.h"
CCL_NAMESPACE_BEGIN
Camera::Camera()
{
shutteropen = 0.0f;
shutterclose = 1.0f;
aperturesize = 0.0f;
focaldistance = 10.0f;
blades = 0;
bladesrotation = 0.0f;
matrix = transform_identity();
ortho = false;
fov = M_PI_F/4.0f;
nearclip = 1e-5f;
farclip = 1e5f;
width = 1024;
height = 512;
left = -((float)width/(float)height);
right = (float)width/(float)height;
bottom = -1.0f;
top = 1.0f;
screentoworld = transform_identity();
rastertoworld = transform_identity();
ndctoworld = transform_identity();
rastertocamera = transform_identity();
cameratoworld = transform_identity();
worldtoraster = transform_identity();
dx = make_float3(0.0f, 0.0f, 0.0f);
dy = make_float3(0.0f, 0.0f, 0.0f);
need_update = true;
need_device_update = true;
}
Camera::~Camera()
{
}
void Camera::update()
{
if(!need_update)
return;
Transform screentocamera;
Transform ndctoraster = transform_scale((float)width, (float)height, 1.0f);
/* raster to screen */
Transform screentoraster = ndctoraster *
transform_scale(1.0f/(right - left), 1.0f/(top - bottom), 1.0f) *
transform_translate(-left, -bottom, 0.0f);
Transform rastertoscreen = transform_inverse(screentoraster);
/* screen to camera */
if(ortho)
screentocamera = transform_inverse(transform_orthographic(nearclip, farclip));
else
screentocamera = transform_inverse(transform_perspective(fov, nearclip, farclip));
rastertocamera = screentocamera * rastertoscreen;
cameratoworld = matrix;
screentoworld = cameratoworld * screentocamera;
rastertoworld = cameratoworld * rastertocamera;
ndctoworld = rastertoworld * ndctoraster;
worldtoraster = transform_inverse(rastertoworld);
/* differentials */
if(ortho) {
dx = transform_direction(&rastertocamera, make_float3(1, 0, 0));
dy = transform_direction(&rastertocamera, make_float3(0, 1, 0));
}
else {
dx = transform(&rastertocamera, make_float3(1, 0, 0)) -
transform(&rastertocamera, make_float3(0, 0, 0));
dy = transform(&rastertocamera, make_float3(0, 1, 0)) -
transform(&rastertocamera, make_float3(0, 0, 0));
}
dx = transform_direction(&cameratoworld, dx);
dy = transform_direction(&cameratoworld, dy);
need_update = false;
need_device_update = true;
}
void Camera::device_update(Device *device, DeviceScene *dscene)
{
update();
if(!need_device_update)
return;
KernelCamera *kcam = &dscene->data.cam;
/* store matrices */
kcam->screentoworld = screentoworld;
kcam->rastertoworld = rastertoworld;
kcam->ndctoworld = ndctoworld;
kcam->rastertocamera = rastertocamera;
kcam->cameratoworld = cameratoworld;
kcam->worldtoscreen = transform_inverse(screentoworld);
kcam->worldtoraster = transform_inverse(rastertoworld);
kcam->worldtondc = transform_inverse(ndctoworld);
kcam->worldtocamera = transform_inverse(cameratoworld);
/* depth of field */
kcam->aperturesize = aperturesize;
kcam->focaldistance = focaldistance;
kcam->blades = (blades < 3)? 0.0f: blades;
kcam->bladesrotation = bladesrotation;
/* motion blur */
kcam->shutteropen = shutteropen;
kcam->shutterclose = shutterclose;
/* type */
kcam->ortho = ortho;
/* size */
kcam->width = width;
kcam->height = height;
/* store differentials */
kcam->dx = dx;
kcam->dy = dy;
/* clipping */
kcam->nearclip = nearclip;
kcam->cliplength = (farclip == FLT_MAX)? FLT_MAX: farclip - nearclip;
need_device_update = false;
}
void Camera::device_free(Device *device, DeviceScene *dscene)
{
/* nothing to free, only writing to constant memory */
}
bool Camera::modified(const Camera& cam)
{
return !((shutteropen == cam.shutteropen) &&
(shutterclose == cam.shutterclose) &&
(aperturesize == cam.aperturesize) &&
(blades == cam.blades) &&
(bladesrotation == cam.bladesrotation) &&
(focaldistance == cam.focaldistance) &&
(ortho == cam.ortho) &&
(fov == cam.fov) &&
(nearclip == cam.nearclip) &&
(farclip == cam.farclip) &&
// modified for progressive render
// (width == cam.width) &&
// (height == cam.height) &&
(left == cam.left) &&
(right == cam.right) &&
(bottom == cam.bottom) &&
(top == cam.top) &&
(matrix == cam.matrix));
}
void Camera::tag_update()
{
need_update = true;
}
CCL_NAMESPACE_END