Python Camera.offset方法代码示例

# 需要导入模块: from pi3d.Camera import Camera [as 别名]
# 或者: from pi3d.Camera.Camera import offset [as 别名]
class StereoCam(object):
    """For creating an apparatus with two sprites to hold left and right
  eye views.

  This Class is used to hold the 3D Camera which should be used to draw
  the 3D objects. It also holds a 2D Camera for drawing the Sprites"""

    def __init__(self, shader="uv_flat", mipmap=False, separation=0.4, interlace=0):
        """ calls Texture.__init__ but doesn't need to set file name as
    texture generated from the framebuffer. Keyword Arguments:

      *shader*
        to use when drawing sprite, defaults to post_base, a simple
        3x3 convolution that does basic edge detection. Can be copied to
        project directory and modified as required.

      *mipmap*
        can be set to True with slight cost to speed, or use fxaa shader

      *separation*
        distance between the two camera positions - how wide apart the
        eye views are.

      *interlace*
        if interlace > 0 then the images are not taken with glScissor and
        must be drawn with a special interlacing shader.
    """
        # load shader
        if interlace <= 0:
            self.shader = Shader(shader)
        else:
            self.shader = Shader(
                vshader_source="""
precision mediump float;
attribute vec3 vertex;
attribute vec2 texcoord;
uniform mat4 modelviewmatrix[2];
varying vec2 texcoordout;
void main(void) {
  texcoordout = texcoord;
  gl_Position = modelviewmatrix[1] * vec4(vertex,1.0);
}
    """,
                fshader_source="""
precision mediump float;
uniform sampler2D tex0;
uniform sampler2D tex1;
varying vec2 texcoordout;
void main(void) {{
  vec4 texc0 = texture2D(tex0, texcoordout);
  vec4 texc1 = texture2D(tex1, texcoordout);
  vec2 coord = vec2(gl_FragCoord);
  gl_FragColor = mix(texc0, texc1, step(0.5, fract(coord.x / {:f})));
}}
    """.format(
                    interlace * 2.0
                ),
            )
            # self.shader = Shader("2d_flat")
        self.camera_3d = Camera()
        self.forMtrx = np.identity(4, dtype="float32")  # initially not rotated
        self.position = [0.0, 0.0, 0.0]
        self.camera_2d = Camera(is_3d=False)
        self.offs = separation / 2.0
        self.interlace = interlace
        self.textures = []
        self.sprites = []
        self.tex_list = []
        for i in range(2):
            self.textures.append(OffScreenTexture(name="stereo"))
            ix, iy = self.textures[i].ix, self.textures[i].iy
            # two sprites full width but moved so that they are centred on the
            # left and right edges. The offset values then move the uv mapping
            # so the image is on the right of the left sprite and left of the
            # right sprite
            self.sprites.append(Sprite(z=20.0, w=ix, h=iy, flip=True))
            if interlace <= 0:
                self.sprites[i].positionX(-ix / 2.0 + i * ix)
                self.sprites[i].set_offset((i * 0.5 - 0.25, 0.0))
            else:
                self.sprites[i].set_2d_size(w=ix, h=iy)
            self.textures[i].blend = True
            self.textures[i].mipmap = mipmap
            self.tex_list.append(self.textures[i])
        opengles.glColorMask(1, 1, 1, 1)

    def move_camera(self, position, rot, tilt, roll=0.0, absolute=True):
        """ Arguments:
    
      *position*
        array [x,y,z]

      *rot, tilt, roll*
        rotations about y, x, z axis (yes it's not entirely logical for position
        to be an array and orientation three values but it's too late to change!)

      *absolute*
        if set to False then the rotations are treated as relative to the
        rotated frame of reference i.e. as if signals from VR headset 3
        axis gyro.
#.........这里部分代码省略.........