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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "Camera.ih"
#include "common/Embree.h"
#include "common/FeatureFlags.ih"
// c++ shared
#include "OrthographicCameraShared.h"
#include "rkcommon/math/AffineSpace.ih"
OSPRAY_BEGIN_ISPC_NAMESPACE
SYCL_EXTERNAL void OrthographicCamera_initRay(const Camera *uniform _self,
varying Ray &ray,
varying RayCone &rayCone,
const varying CameraSample &sample,
const uniform FeatureFlagsHandler &ffh)
{
const OrthographicCamera *uniform self =
(const OrthographicCamera *uniform)_self;
const vec2f screen = Camera_subRegion(_self, sample.screen);
const float time = Camera_shutterTime(_self, screen, sample.time);
vec3f dir;
vec3f org;
const uniform FeatureFlagsOther ffo = getFeatureFlagsOther(ffh);
if (self->super.motionBlur && (ffo & FFO_CAMERA_MOTION_BLUR)) {
AffineSpace3f xfm;
rtcGetGeometryTransformFromScene(
self->super.scene, 0, time, RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR, &xfm);
// we cannot just transform the final org & dir, because interpolated
// transforms can scale (even if original transforms are without scale)
dir = normalize(xfmVector(xfm, self->dir));
const vec3f up = xfmVector(xfm, self->dv_up);
org = xfmPoint(xfm, self->org);
const vec3f du = normalize(cross(dir, up));
const vec3f dv = cross(du, dir);
const float x = (screen.x - 0.5f) * self->du_size.x;
const float y = (screen.y - 0.5f) * self->du_size.y;
org = org + x * du + y * dv;
} else {
dir = self->dir;
org = self->org + screen.x * self->du_size + screen.y * self->dv_up;
}
setRay(ray, org, dir, self->super.nearClip, inf, time);
const uniform vec2f subImageSize = box_size(self->super.subImage);
rayCone.width = self->height * abs(subImageSize.y);
rayCone.dwdt = 0.f;
}
// Exports (called from C++) //////////////////////////////////////////////////
export void *uniform OrthographicCamera_initRay_addr()
{
return (void *uniform)OrthographicCamera_initRay;
}
OSPRAY_END_ISPC_NAMESPACE
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