Module AggiEngine.gamescreen

Classes

class GameScreen (parent: PySide2.QtWidgets.QWidget)

QOpenGLWidget(self, parent: typing.Union[PySide2.QtWidgets.QWidget, NoneType] = None, f: PySide2.QtCore.Qt.WindowFlags = Default(Qt.WindowFlags)) -> None

Subclass of the QOpenGLWidget, this is promoted in Qt Designer so that we can draw to the widget. parent: The widget that the this held under usually MainWindow

Expand source code

class GameScreen(QOpenGLWidget):

    def __init__(self, parent: QWidget):
        '''
        Subclass of the QOpenGLWidget, this is promoted in Qt Designer so that
        we can draw to the widget.
        ``parent:`` The widget that the this held under usually MainWindow  
        '''
        super(GameScreen, self).__init__(parent=parent)

        self.cameraPosition = [0, 0]
        self.cameraScale = 1
        self.renderInfoList = []
        self.bgColor = [0, 0, 0]

    def initializeGL(self) -> None:
        '''
        Sets up OpenGL for rendering
        '''
        glEnable(GL_BLEND)
        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
        glClearColor(self.bgColor[0], self.bgColor[1], self.bgColor[2], 1)
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        glEnable(GL_TEXTURE_2D)

    def paintGL(self) -> None:
        '''
        Draws all game objects rect and texture id given by game object handler
        '''

        glClearColor(self.bgColor[0], self.bgColor[1], self.bgColor[2], 1)
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        glColor3f(1, 1, 1)
        glLoadIdentity()
        glScalef(self.cameraScale, self.cameraScale, 0)
        glTranslatef(-self.cameraPosition[0], -self.cameraPosition[1], 0)
        for renderInfo in self.renderInfoList:

            if renderInfo[0] == -1:
                glPushMatrix()
                glTranslatef(renderInfo[3][0], renderInfo[3][1], 0)
                glRotatef(renderInfo[4], 0, 0, 1)
                glColor4f(renderInfo[2][0], renderInfo[2][1], renderInfo[2][2], renderInfo[2][3])
                glPolygonMode(GL_FRONT, GL_FILL)
                glBegin(GL_POLYGON)
                for vertex in renderInfo[1]:
                    glVertex2f(vertex[0], vertex[1])
                glEnd()
                glPopMatrix()
            else:
                glPushMatrix()
                glTranslatef(renderInfo[3][0], renderInfo[3][1], 0)
                glRotatef(renderInfo[4], 0, 0, 1)
                glBindTexture(GL_TEXTURE_2D, renderInfo[0])
                glBegin(GL_QUADS)
                glTexCoord2f(0, 0)
                glVertex2f(renderInfo[1], renderInfo[2])
                glTexCoord2f(1, 0)
                glVertex2f(-renderInfo[1], renderInfo[2])
                glTexCoord2f(1, 1)
                glVertex2f(-renderInfo[1], -renderInfo[2])
                glTexCoord2f(0, 1)
                glVertex2f(renderInfo[1], -renderInfo[2])
                glEnd()
                glBindTexture(GL_TEXTURE_2D, 0)
                glPopMatrix()

    def resizeGL(self, w, h) -> None:
        '''
        Resize event recalculates values to maintain the same image.
        '''
        glViewport(0, 0, w, h)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        aspect = w / h
        glOrtho(aspect, -aspect, -1.0, 1.0, 1.0, -1.0)
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()

    def loadTexture(self, imageData: [int], width: int, height: int) -> int:
        '''
        Loads the texture to the render device.
        Returns it's texture id.
        '''
        textureID = glGenTextures(1)
        glPixelStorei(GL_UNPACK_ALIGNMENT, 4)
        glBindTexture(GL_TEXTURE_2D, textureID)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData)
        return textureID

    def loadImageTexture(self, fileName: str) -> int:
        '''
        Loads an image from a path and loads it to the render device.
        Returns the texture id of the image.
        '''
        image = Image.open(fileName)

        # Add alpha if the base image doesn't have one
        if not (fileName.split(".")[-1] == "png"):
            image.putalpha(256)

        # Making image data for OpenGL
        imageData = numpy.array(list(image.getdata()), numpy.uint8)
        return self.loadTexture(imageData, image.width, image.height)

    def image_loader(self, filename: str, colorkey, **kwargs) -> Callable:
        '''
        The image loader used by pytmx so that all images are sent to the render devices memory for quick drawing.
        '''
        image = Image.open(filename)
        transparent = filename.split(".")[-1] == "png"

        def extract_image(rect: Optional[list] = None, flags=None) -> int:
            # Cropping the image to the necessary size
            if rect:
                crop = image.crop((rect[0], rect[1], rect[0] + rect[2], rect[1] + rect[3]))
            else:
                crop = image

            if flags:
                # Handling the flags
                if flags.flipped_horizontally:
                    crop = ImageOps.mirror(crop)
                if flags.flipped_vertically:
                    crop = ImageOps.flip(crop)
            
            # Add alpha if the base image doesn't have one
            if not transparent:
                crop.putalpha(256)
            # Making image data for OpenGL
            imageData = numpy.array(list(crop.getdata()), numpy.uint8)
            return self.loadTexture(imageData, crop.width, crop.height), crop.width, crop.height

        return extract_image

Ancestors

• PySide2.QtWidgets.QOpenGLWidget
• PySide2.QtWidgets.QWidget
• PySide2.QtCore.QObject
• PySide2.QtGui.QPaintDevice
• Shiboken.Object

Class variables

var staticMetaObject

Methods

def image_loader(self, filename: str, colorkey, **kwargs) ‑> typing.Callable

The image loader used by pytmx so that all images are sent to the render devices memory for quick drawing.

Expand source code

def image_loader(self, filename: str, colorkey, **kwargs) -> Callable:
    '''
    The image loader used by pytmx so that all images are sent to the render devices memory for quick drawing.
    '''
    image = Image.open(filename)
    transparent = filename.split(".")[-1] == "png"

    def extract_image(rect: Optional[list] = None, flags=None) -> int:
        # Cropping the image to the necessary size
        if rect:
            crop = image.crop((rect[0], rect[1], rect[0] + rect[2], rect[1] + rect[3]))
        else:
            crop = image

        if flags:
            # Handling the flags
            if flags.flipped_horizontally:
                crop = ImageOps.mirror(crop)
            if flags.flipped_vertically:
                crop = ImageOps.flip(crop)
        
        # Add alpha if the base image doesn't have one
        if not transparent:
            crop.putalpha(256)
        # Making image data for OpenGL
        imageData = numpy.array(list(crop.getdata()), numpy.uint8)
        return self.loadTexture(imageData, crop.width, crop.height), crop.width, crop.height

    return extract_image

def initializeGL(self) ‑> NoneType

Sets up OpenGL for rendering

Expand source code

def initializeGL(self) -> None:
    '''
    Sets up OpenGL for rendering
    '''
    glEnable(GL_BLEND)
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
    glClearColor(self.bgColor[0], self.bgColor[1], self.bgColor[2], 1)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glEnable(GL_TEXTURE_2D)

def loadImageTexture(self, fileName: str) ‑> int

Loads an image from a path and loads it to the render device. Returns the texture id of the image.

Expand source code

def loadImageTexture(self, fileName: str) -> int:
    '''
    Loads an image from a path and loads it to the render device.
    Returns the texture id of the image.
    '''
    image = Image.open(fileName)

    # Add alpha if the base image doesn't have one
    if not (fileName.split(".")[-1] == "png"):
        image.putalpha(256)

    # Making image data for OpenGL
    imageData = numpy.array(list(image.getdata()), numpy.uint8)
    return self.loadTexture(imageData, image.width, image.height)

def loadTexture(self, imageData: [], width: int, height: int) ‑> int

Loads the texture to the render device. Returns it's texture id.

Expand source code

def loadTexture(self, imageData: [int], width: int, height: int) -> int:
    '''
    Loads the texture to the render device.
    Returns it's texture id.
    '''
    textureID = glGenTextures(1)
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4)
    glBindTexture(GL_TEXTURE_2D, textureID)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData)
    return textureID

def paintGL(self) ‑> NoneType

Draws all game objects rect and texture id given by game object handler

Expand source code

def paintGL(self) -> None:
    '''
    Draws all game objects rect and texture id given by game object handler
    '''

    glClearColor(self.bgColor[0], self.bgColor[1], self.bgColor[2], 1)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glColor3f(1, 1, 1)
    glLoadIdentity()
    glScalef(self.cameraScale, self.cameraScale, 0)
    glTranslatef(-self.cameraPosition[0], -self.cameraPosition[1], 0)
    for renderInfo in self.renderInfoList:

        if renderInfo[0] == -1:
            glPushMatrix()
            glTranslatef(renderInfo[3][0], renderInfo[3][1], 0)
            glRotatef(renderInfo[4], 0, 0, 1)
            glColor4f(renderInfo[2][0], renderInfo[2][1], renderInfo[2][2], renderInfo[2][3])
            glPolygonMode(GL_FRONT, GL_FILL)
            glBegin(GL_POLYGON)
            for vertex in renderInfo[1]:
                glVertex2f(vertex[0], vertex[1])
            glEnd()
            glPopMatrix()
        else:
            glPushMatrix()
            glTranslatef(renderInfo[3][0], renderInfo[3][1], 0)
            glRotatef(renderInfo[4], 0, 0, 1)
            glBindTexture(GL_TEXTURE_2D, renderInfo[0])
            glBegin(GL_QUADS)
            glTexCoord2f(0, 0)
            glVertex2f(renderInfo[1], renderInfo[2])
            glTexCoord2f(1, 0)
            glVertex2f(-renderInfo[1], renderInfo[2])
            glTexCoord2f(1, 1)
            glVertex2f(-renderInfo[1], -renderInfo[2])
            glTexCoord2f(0, 1)
            glVertex2f(renderInfo[1], -renderInfo[2])
            glEnd()
            glBindTexture(GL_TEXTURE_2D, 0)
            glPopMatrix()

def resizeGL(self, w, h) ‑> NoneType

Resize event recalculates values to maintain the same image.

Expand source code

def resizeGL(self, w, h) -> None:
    '''
    Resize event recalculates values to maintain the same image.
    '''
    glViewport(0, 0, w, h)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    aspect = w / h
    glOrtho(aspect, -aspect, -1.0, 1.0, 1.0, -1.0)
    glMatrixMode(GL_MODELVIEW)
    glLoadIdentity()