Bluefish444 Create3D Manual de usuario descargar pdf (Pagina 23)

of the rectangle to the camera so the rectangle fitting the screen can be placed in front of

or behind other objects. If a live video is placed on the rectangle and you also use the

chroma keyer (see further details later on), you at once obtain a basic virtual studio. By

keying out the background in the live feed and just keeping the main element – usually

the presenter of the foreground you can place computer created graphics behind the

presenter (with a distance in Z bigger than our rectangle) and other elements in front

(closer than the rectangle). This function can also be used to place a texture of a still

image or sequence or even an AVI file as the background of the whole scene. You just

need to apply this texture on the material of the rectangle and move the rectangle very far

so it won't cover any other objects.

If you want to animate the rectangle, you cannot fix its size to full screen, but you can set

its translation parameters to cover the screen by clicking on the 'S' button next to the

checkbox. Only the current value of the Scale X parameter will be taken into account

though, you have to manually set Scale Y according to the correct aspect ratio of the

screen.

● Tex adj. button: This can be useful if you want to use a cutout of the texture applied on a

rectangle. This button works as a toggle, switched on it turns red, and lets you use the

mouse and its left button to define a rectangular area in the Preview Window which will

let you crop the applied texture by modifying its offsetX, offsetY, sizeX and sizeY

parameters. You should switch on fit to screen before you use this function. If you are

satisfied with the settings, click on the button again to use the new settings.

● Reflective mirror: by switching this option on, the rectangle becomes a mirror, and it will

reflect those objects that have their corresponding rendering switch turned on. The

reflectivity of the mirror can be adjusted by setting the reflectivity property of its material.

Properties of all other primitives:

● inner radius

● outer radius (it has no meaning with spheres, but it has with a torus).

● start angle

● sweep angle: central angle of the segment of a circle. Together with start angle, it is

useful only with the partial disk and the piechart primitives.

● material: material of the primitive chosen from the dropdown list of available materials.

● texture offsetX, texture offsetY, sizeX, sizeY

When a texture is defined for the material, the texture can be transformed by setting

these parameters. The offset values translate the texture coordinates, the size values

scale them and the texture is magnified or shrunk and repeated on the primitive.

● stretch over clones: it works with any primitive, but it is probably only useful with

rectangles. You can define several clones of the same rectangle, placing them next to

each other as elements of a 2D grid. Using this option means that the texture defined for

the material will not be repeated on the individual clones, but each clone will obtain only a

part of the whole texture. By animating the clones very interesting effects can be

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Bluefish444 Create3D Manual de usuario Pagina 23