/**
* Performs a depth-first search of the scenegraph.
* Returns the first camera whose name contains @c nameToMatch (or, if @c nameToMatch is emptystring, just returns the first camera),
* with its transform altered to incorporate the transforms of its ancestor objects.
* Output paramater @c foundCamera indicates whether a camera was found.
* If no camera was found, returns VuoSceneObject_makeDefaultCamera().
*/
VuoSceneObject VuoSceneObject_findCamera(VuoSceneObject so, VuoText nameToMatch, bool *foundCamera)
{
float localModelviewMatrix[16];
VuoTransform_getMatrix(VuoTransform_makeIdentity(), localModelviewMatrix);
return VuoSceneObject_findCameraInternal(so, nameToMatch, foundCamera, localModelviewMatrix);
}
/**
* Returns a column-major matrix of 16 values that transforms a 1x1 quad so that it renders the specified image at real (pixel-perfect) size.
*/
void VuoTransform_getBillboardMatrix(VuoInteger imageWidth, VuoInteger imageHeight, VuoReal translationX, VuoReal translationY, VuoInteger viewportWidth, VuoInteger viewportHeight, float *billboardMatrix)
{
VuoTransform_getMatrix(VuoTransform_makeIdentity(), billboardMatrix);
// Apply scale to make the image appear at real size (1:1).
billboardMatrix[0] = 2. * imageWidth/viewportWidth;
billboardMatrix[5] = billboardMatrix[0] * imageHeight/imageWidth;
// Apply 2D translation.
// Align the translation to pixel boundaries
billboardMatrix[12] = floor((translationX+1.)/2.*viewportWidth) / ((float)viewportWidth) * 2. - 1.;
billboardMatrix[13] = floor((translationY+1.)/2.*viewportWidth) / ((float)viewportWidth) * 2. - 1.;
// Account for odd-dimensioned image
billboardMatrix[12] += (imageWidth % 2 ? (1./viewportWidth) : 0);
billboardMatrix[13] -= (imageHeight % 2 ? (1./viewportWidth) : 0);
// Account for odd-dimensioned viewport
billboardMatrix[13] += (viewportWidth % 2 ? (1./viewportWidth) : 0);
billboardMatrix[13] -= (viewportHeight % 2 ? (1./viewportWidth) : 0);
}
/**
* Finds and returns all the lights in the scene.
*
* If there are multiple ambient lights, returns the weighted (by alpha) average color and summed brightness.
*
* If there are no lights in the scene, returns some default lights.
*/
void VuoSceneObject_findLights(VuoSceneObject so, VuoColor *ambientColor, float *ambientBrightness, VuoList_VuoSceneObject *pointLights, VuoList_VuoSceneObject *spotLights)
{
VuoList_VuoColor ambientColors = VuoListCreate_VuoColor();
VuoRetain(ambientColors);
*ambientBrightness = 0;
*pointLights = VuoListCreate_VuoSceneObject();
*spotLights = VuoListCreate_VuoSceneObject();
float localModelviewMatrix[16];
VuoTransform_getMatrix(VuoTransform_makeIdentity(), localModelviewMatrix);
VuoSceneObject_findLightsRecursive(so, localModelviewMatrix, ambientColors, ambientBrightness, *pointLights, *spotLights);
if (!VuoListGetCount_VuoColor(ambientColors)
&& !VuoListGetCount_VuoSceneObject(*pointLights)
&& !VuoListGetCount_VuoSceneObject(*spotLights))
{
*ambientColor = VuoColor_makeWithRGBA(1,1,1,1);
*ambientBrightness = 0.05;
// https://en.wikipedia.org/wiki/Three-point_lighting
VuoSceneObject keyLight = VuoSceneObject_makePointLight(VuoColor_makeWithRGBA(1,1,1,1), .70, VuoPoint3d_make(-1,1,1), 5, .5);
VuoListAppendValue_VuoSceneObject(*pointLights, keyLight);
VuoSceneObject fillLight = VuoSceneObject_makePointLight(VuoColor_makeWithRGBA(1,1,1,1), .2, VuoPoint3d_make(.5,0,1), 5, 0);
VuoListAppendValue_VuoSceneObject(*pointLights, fillLight);
VuoSceneObject backLight = VuoSceneObject_makePointLight(VuoColor_makeWithRGBA(1,1,1,1), .15, VuoPoint3d_make(1,.75,-.5), 5, 0);
VuoListAppendValue_VuoSceneObject(*pointLights, backLight);
}
else
*ambientColor = VuoColor_average(ambientColors);
VuoRelease(ambientColors);
}
/**
* @ingroup VuoTransform
* Decodes the JSON object @c js to create a new value.
*
* @eg{"identity"}
* @eg{
* {
* "quaternionRotation" = [0,0,0,1],
* "translation" = [0,0,0],
* "scale" = [1,1,1]
* }
* }
* @eg{
* {
* "eulerRotation" = [0,0,0],
* "translation" = [0,0,0],
* "scale" = [1,1,1]
* }
* }
*/
VuoTransform VuoTransform_valueFromJson(json_object *js)
{
VuoTransform t = VuoTransform_makeIdentity();
json_object *o = NULL;
if (json_object_object_get_ex(js, "target", &o))
{
VuoPoint3d target;
target.x = json_object_get_double(json_object_array_get_idx(o,0));
target.y = json_object_get_double(json_object_array_get_idx(o,1));
target.z = json_object_get_double(json_object_array_get_idx(o,2));
VuoPoint3d position = VuoPoint3d_make(0,0,0);
if (json_object_object_get_ex(js, "translation", &o))
{
position.x = json_object_get_double(json_object_array_get_idx(o,0));
position.y = json_object_get_double(json_object_array_get_idx(o,1));
position.z = json_object_get_double(json_object_array_get_idx(o,2));
}
VuoPoint3d upDirection = VuoPoint3d_make(0,1,0);
if (json_object_object_get_ex(js, "upDirection", &o))
{
upDirection.x = json_object_get_double(json_object_array_get_idx(o,0));
upDirection.y = json_object_get_double(json_object_array_get_idx(o,1));
upDirection.z = json_object_get_double(json_object_array_get_idx(o,2));
}
return VuoTransform_makeFromTarget(position, target, upDirection);
}
if (json_object_object_get_ex(js, "quaternionRotation", &o))
{
t.type = VuoTransformTypeQuaternion;
VuoPoint4d q;
q.x = json_object_get_double(json_object_array_get_idx(o,0));
q.y = json_object_get_double(json_object_array_get_idx(o,1));
q.z = json_object_get_double(json_object_array_get_idx(o,2));
q.w = json_object_get_double(json_object_array_get_idx(o,3));
t = VuoTransform_makeQuaternion(VuoPoint3d_make(0,0,0), q, VuoPoint3d_make(0,0,0));
}
else if (json_object_object_get_ex(js, "eulerRotation", &o))
{
t.type = VuoTransformTypeEuler;
VuoPoint3d e;
e.x = json_object_get_double(json_object_array_get_idx(o,0));
e.y = json_object_get_double(json_object_array_get_idx(o,1));
e.z = json_object_get_double(json_object_array_get_idx(o,2));
t = VuoTransform_makeEuler(VuoPoint3d_make(0,0,0), e, VuoPoint3d_make(0,0,0));
}
if (json_object_object_get_ex(js, "translation", &o))
{
t.translation.x = json_object_get_double(json_object_array_get_idx(o,0));
t.translation.y = json_object_get_double(json_object_array_get_idx(o,1));
t.translation.z = json_object_get_double(json_object_array_get_idx(o,2));
}
if (json_object_object_get_ex(js, "scale", &o))
{
t.scale.x = json_object_get_double(json_object_array_get_idx(o,0));
t.scale.y = json_object_get_double(json_object_array_get_idx(o,1));
t.scale.z = json_object_get_double(json_object_array_get_idx(o,2));
}
return t;
}
* vuo.transform.combine node implementation.
*
* @copyright Copyright © 2012–2015 Kosada Incorporated.
* This code may be modified and distributed under the terms of the MIT License.
* For more information, see http://vuo.org/license.
*/
#include "node.h"
VuoModuleMetadata({
"title" : "Combine Transforms",
"keywords" : [ "composite", "product", "multiply", "merge" ],
"version" : "1.0.0",
"node": {
"exampleCompositions" : [ "TiltAndOrbitCube.vuo" ]
}
});
void nodeEvent
(
VuoInputData(VuoList_VuoTransform) transforms,
VuoOutputData(VuoTransform) composite
)
{
*composite = VuoTransform_makeIdentity();
unsigned long transformCount = VuoListGetCount_VuoTransform(transforms);
for (unsigned long i = 1; i <= transformCount; ++i)
*composite = VuoTransform_composite(*composite, VuoListGetValue_VuoTransform(transforms, i));
}
