Unigine::WidgetCanvas Class

WidgetCanvas Class

Members

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static WidgetCanvasPtr create ( const Ptr<Gui> & gui ) #

Constructor. Creates a new canvas widget and adds it to the specified GUI.

Arguments

• const Ptr<Gui> & gui - GUI, to which the canvas will belong.

static WidgetCanvasPtr create ( ) #

Constructor. Creates a new canvas widget and adds it to the Engine GUI.

void setColor ( const Math::vec4 & color ) #

Sets a background color for the canvas widget.

Arguments

• const Math::vec4 & color - Background color.

Math::vec4 getColor ( ) const#

Returns the background color of the canvas widget.

Return value

Background color.

void setImage ( const Ptr<Image> & image ) #

Sets the image used as the default texture for new polygons added to the canvas widget.

Arguments

• const Ptr<Image> & image - Texture image.

Ptr<Image> getImage ( ) const#

Returns the current default texture image used for new polygons added to the canvas widget.

Return value

Texture image.

int getLine ( int num ) const#

Returns the canvas element ID of the line by its number.

Arguments

• int num - Line number in range from 0 to the total number lines.

Return value

Canvas element ID of the line.

void setLineColor ( int line, const Math::vec4 & color ) #

Updates the color of the specified line.

Arguments

• int line - Canvas element ID of the line.
• const Math::vec4 & color - Line color.

Math::vec4 getLineColor ( int line ) const#

Returns the current color of the specified line.

Arguments

• int line - Canvas element ID of the line.

Return value

Line color.

int getLineIndex ( int line, int num ) const#

Returns the index of the point of the line segment by its number.

Arguments

• int line - Canvas element ID of the line.
• int num - The number of the index of the point of the line segment.

Return value

Index of the point of the line segment.

int getLineIntersection ( int x, int y, float distance ) const#

Checks whether the specified point (e.g. the mouse cursor) intersects with lines drawn in the canvas widget.

Arguments

• int x - X coordinate of the point.
• int y - Y coordinate of the point.
• float distance - Point radius acceptable for detecting intersection.

Return value

Number of the first intersected line with the highest rendering order in the array of lines. If no intersections are found, -1 will be returned.

void setLineOrder ( int line, int order ) #

Updates the rendering order of the given line (the higher the value, the later the line will be rendered atop other elements).

Arguments

• int line - Canvas element ID of the line.
• int order - Rendering order.

int getLineOrder ( int line ) const#

Returns the rendering order of the given line (the higher the value, the later the line is rendered atop other elements).

Arguments

• int line - Canvas element ID of the line.

Return value

Rendering order.

Math::vec3 getLinePoint ( int line, int num ) const#

Returns the coordinates of the specified line segment point.

Arguments

• int line - Canvas element ID of the line.
• int num - Number of the line segment point.

Return value

Segment point coordinates.

void setLineTransform ( int line, const Math::mat4 & transform ) #

Updates the transformation matrix of the specified line.

Arguments

• int line - Canvas element ID of the line.
• const Math::mat4 & transform - Transformation matrix.

Math::mat4 getLineTransform ( int line ) const#

Returns the current transformation matrix of the specified line.

Arguments

• int line - Canvas element ID of the line.

Return value

Transformation matrix.

int getNumLineIndices ( int line ) const#

Returns the total number of indices set for the points that form line segments.

Arguments

• int line - Canvas element ID of the line.

Return value

The number of indices set for the points that form line segments.

int getNumLinePoints ( int line ) const#

Returns the number of the points that create line segments.

Arguments

• int line - Canvas element ID of the line.

Return value

Number of line segment points.

int getNumLines ( ) const#

Returns the number of lines drawn in the canvas widget.

Return value

Number of lines.

int getNumPolygonIndices ( int polygon ) const#

Returns the total number of indices set for points of the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

The number of indices set for points that form polygons.

int getNumPolygonPoints ( int polygon ) const#

Returns the number of points that form the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Number of polygon points.

int getNumPolygons ( ) const#

Returns the number of polygons drawn in the canvas widget.

Return value

Number of polygons.

int getNumTexts ( ) const#

Returns the number of text strings drawn in the canvas widget.

Return value

Number of text strings.

int getPolygon ( int num ) const#

Returns the canvas element ID of the polygon by its index.

Arguments

• int num - Polygon number in range from 0 to the total number of polygons.

Return value

Canvas element ID of the polygon.

int getPolygonBlendDestFunc ( int polygon ) const#

Returns the blending mode of the destination color for the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Blending mode of the destination color (one of the BLEND_*).

void setPolygonBlendFunc ( int polygon, int src, int dest ) #

Updates the blending coefficients for specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• int src - Blending mode for the source screen buffer color (one of the BLEND_*).
• int dest - Blending mode for the destination polygon color (one of the BLEND_*).

int getPolygonBlendSrcFunc ( int polygon ) const#

Returns the blending mode of the source screen buffer color for the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Blending mode of the source screen buffer color (one of the BLEND_*).

void setPolygonColor ( int polygon, const Math::vec4 & color ) #

Updates the color of the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• const Math::vec4 & color - Polygon color.

Math::vec4 getPolygonColor ( int polygon ) const#

Returns the current color of the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Polygon color.

void setPolygonImage ( int polygon, const Ptr<Image> & image ) #

Sets an image for a given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• const Ptr<Image> & image - Image to set.

Ptr<Image> getPolygonImage ( int polygon ) #

Returns the current image set for a given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Current image set for the specified polygon.

int getPolygonIndex ( int polygon, int num ) const#

Returns the index of the point of the polygon by its number.

Arguments

• int polygon - Canvas element ID of the polygon.
• int num - The number of the index of the point of the polygon.

Return value

Index of the point of the polygon.

int getPolygonIntersection ( int x, int y ) const#

Checks whether the specified point (e.g. the mouse cursor) intersects with widget polygons.

Arguments

• int x - X coordinate of the point.
• int y - Y coordinate of the point.

Return value

Number of the first intersected polygon with the highest rendering order in the array of polygons. If no intersections are found, -1 will be returned.

void setPolygonOrder ( int polygon, int order ) #

Updates the rendering order of the given polygon (the higher the value, the later the polygon will be rendered atop other elements).

Arguments

• int polygon - Canvas element ID of the polygon.
• int order - Rendering order.

int getPolygonOrder ( int polygon ) const#

Returns the rendering order of the given polygon (the higher the value, the later the polygon is rendered atop other elements).

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Rendering order.

Math::vec3 getPolygonPoint ( int polygon, int num ) const#

Returns the coordinates of the specified polygon point.

Arguments

• int polygon - Canvas element ID of the polygon.
• int num - Number of the polygon point.

Return value

Polygon point coordinates.

void setPolygonTexCoord ( int polygon, const Math::vec2 & texcoord ) #

Updates the texture coordinates for the last added point of the polygon. Before calling this function, the point should be added with addPolygonPoint().

Arguments

• int polygon - Canvas element ID of the polygon.
• const Math::vec2 & texcoord - Texture coordinates for the point.

Math::vec2 getPolygonTexCoord ( int polygon, int num ) const#

Returns the texture coordinates of the specified point of the polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• int num - Number of the polygon point.

Return value

Texture coordinates of the point.

void setPolygonTexture ( int polygon, const char * name ) #

Sets a texture from a file for the given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• const char * name - Path to the texture.

const char * getPolygonTexture ( int polygon ) const#

Returns the current texture set for a given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Path to the texture.

void setPolygonTransform ( int polygon, const Math::mat4 & transform ) #

Updates the transformation matrix of the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• const Math::mat4 & transform - Transformation matrix.

Math::mat4 getPolygonTransform ( int polygon ) const#

Returns the current transformation matrix of the specified polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Transformation matrix.

void setPolygonTwoSided ( int polygon, int two_sided ) #

Sets polygon two sided option.

Arguments

• int polygon - Canvas element ID of the polygon.
• int two_sided - two sided option.

int getPolygonTwoSided ( int polygon ) const#

Gets polygon two sided option.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

Returns two sided option.

void setPolygonWrapRepeat ( int polygon, int repeat ) #

Sets texture tiling for a given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• int repeat - Positive number to enable texture tiling; 0 to disable it.

int getPolygonWrapRepeat ( int polygon ) const#

Returns a value indicating if texture tiling is enabled for the given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

1 if texture tiling is enabled; 0 if disabled.

int getText ( int num ) const#

Returns the canvas element ID of the text string by its number.

Arguments

• int num - Number of the text element.

Return value

Canvas element ID of the text string.

void setTextColor ( int text, const Math::vec4 & color ) #

Updates the color of the specified text.

Arguments

• int text - Canvas element ID of the text string.
• const Math::vec4 & color - Font color.

Math::vec4 getTextColor ( int text ) const#

Returns the current color of the specified text.

Arguments

• int text - Canvas element ID of the text string.

Return value

Font color.

int getTextHeight ( int text ) const#

Returns the height of the given text element on the canvas widget.

Arguments

• int text - Canvas element ID of the text string.

Return value

Text height in pixels.

int getTextIntersection ( int x, int y ) const#

Checks whether the specified point (e.g. the mouse cursor) intersects with a bounding box of widget text.

Arguments

• int x - coordinate of the point.
• int y - coordinate of the point.

Return value

ID of the intersected text lines array; otherwise, -1 is returned if no intersections are found.

void setTextOrder ( int text, int order ) #

Updates the rendering order of the given text element (the higher the value, the later the text will be rendered atop other elements).

Arguments

• int text - Canvas element ID of the text string.
• int order - Rendering order.

int getTextOrder ( int text ) const#

Returns the rendering order of the given text element (the higher the value, the later the text is rendered atop other elements).

Arguments

• int text - Canvas element ID of the text string.

Return value

Rendering order.

void setTextOutline ( int text, int outline ) #

Sets a value indicating if the text should be rendered casting a shadow. Positive or negative values set the distance in pixels to offset the outline. The default is 0 (no outlining).

Arguments

• int text - Canvas element ID of the text string.
• int outline - Outline offset:
  • Positive values set offset in the bottom-right corner direction.
  • Negative values set offset in the top-left corner direction (the outline will overlap widget text).
  • 0 is not to use outlining.

int getTextOutline ( int text ) const#

Returns a value indicating if the text is rendered casting a shadow. Positive or negative values determine the distance in pixels used to offset the outline.

Arguments

• int text - Canvas element ID of the text string.

Return value

Positive value if the outline is offset in the bottom-right corner direction. Negative value if the outline is offset in the top-left corner direction. 0 if font is not outlined.

void setTextPosition ( int text, const Math::vec2 & position ) #

Updates the position of the specified text.

Arguments

• int text - Canvas element ID of the text string.
• const Math::vec2 & position - Text position coordinates.

Math::vec2 getTextPosition ( int text ) const#

Returns the current position of the specified text.

Arguments

• int text - Canvas element ID of the text string.

Return value

Text position coordinates.

void setTextSize ( int text, int size ) #

Updates the font size of the specified text.

Arguments

• int text - Canvas element ID of the text string.
• int size - Font size.

int getTextSize ( int text ) const#

Returns the current font size of the specified text.

Arguments

• int text - Canvas element ID of the text string.

Return value

Font size.

void setTextText ( int text, const char * str ) #

Updates the text to be drawn in the given text element on the canvas widget.

Arguments

• int text - Canvas element ID of the text string.
• const char * str - Text string.

const char * getTextText ( int text ) const#

Returns the current text drawn in the given text element on the canvas widget.

Arguments

• int text - Canvas element ID of the text string.

Return value

Text string.

void setTextTransform ( int text, const Math::mat4 & transform ) #

Updates the transformation matrix of the specified text.

Arguments

• int text - Canvas element ID of the text string.
• const Math::mat4 & transform - Transformation matrix.

Math::mat4 getTextTransform ( int text ) const#

Returns the current transformation matrix of the specified text.

Arguments

• int text - Canvas element ID of the text string.

Return value

Transformation matrix.

void setTexture ( const char * texture ) #

Sets the texture that will be used by default for new polygons added to the canvas widget.

Arguments

• const char * texture - Path to the texture.

const char * getTexture ( ) const#

Returns the path to the texture used by default for new polygons added to the canvas widget.

Return value

Path to the texture.

int getTextWidth ( int text ) const#

Returns the width of the given text element on the canvas widget.

Arguments

• int text - Canvas element ID of the text string.

Return value

Text width in pixels.

void setTransform ( const Math::mat4 & transform ) #

Sets a transformation matrix applied to all primitives on the canvas widget.

Arguments

• const Math::mat4 & transform - Transformation matrix.

Math::mat4 getTransform ( ) const#

Returns the transformation matrix applied to all primitives on the canvas widget.

Return value

Transformation matrix.

int addLine ( int order = 0 ) #

Adds a new line to the canvas widget. By default, it is rendered in white color.

Arguments

• int order - Rendering order (the higher the value, the later the line will be rendered atop other elements).

Return value

Canvas element ID for the added line.

int addLineIndex ( int line, int index ) #

Adds an index for the point of the line segment in the canvas widget. Notice that before adding indices, you should add all points that form the line.

Arguments

• int line - Canvas element ID of the line.
• int index - Index of the point of the line segment.

Return value

The number of the added index in the array of line indices.

int addLinePoint ( int line, const Math::vec3 & point ) #

Adds a new segment to the line in the canvas widget.

Arguments

• int line - Canvas element ID of the line.
• const Math::vec3 & point - Segment point coordinates.

Return value

Number of the added line segment point.

int addLinePoint ( int line, const Math::vec2& point ) #

Adds a new segment to the line in the canvas widget.

Arguments

• int line - Canvas element ID of the line.
• const Math::vec2& point - Segment point coordinates.

Return value

Number of the added line segment point.

void setLinePoint ( int line, int num, const Math::vec3& point ) #

Sets a line segment in the canvas widget.

Arguments

• int line - Canvas element ID of the line.
• int num - Index of the point in the array of line points.
• const Math::vec3& point - Line point coordinates.

void setLinePoint ( int line, int num, const Math::vec2& point ) #

Sets a line segment in the canvas widget.

Arguments

• int line - Canvas element ID of the line.
• int num - Index of the point in the array of line points.
• const Math::vec2& point - Line point coordinates.

int addPolygon ( int polygon = 0 ) #

Adds a new polygon to the canvas widget. By default, it is rendered in white color. Texture tiling mode is disabled.

Arguments

• int polygon - Rendering order (the higher the value, the later the polygon will be rendered atop other elements).

Return value

Canvas element ID for the added polygon.

int addPolygonIndex ( int polygon, int index ) #

Adds an index for the point of the polygon in the canvas widget. Notice that before adding indices, you should add all points that form the polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• int index - Index of the point of the polygon.

Return value

The number of the added index in the array of polygon indices.

int addPolygonPoint ( int polygon, const Math::vec3 & point ) #

Adds a new point to the polygon in the canvas widget.

Arguments

• int polygon - Canvas element ID of the polygon.
• const Math::vec3 & point - Polygon point coordinates.

Return value

Number of the added polygon point.

int addText ( int order = 0 ) #

Adds a new text string to the canvas widget. By default, it is rendered in white color. If a font size is not set for the canvas widget, a default one is used. No shadow is cast from a text (no outlining). Text width and height on the canvas widget are equal to 0.

Arguments

• int order - Rendering order (the higher the value, the later the text will be rendered atop other elements).

Return value

Canvas element ID of the added text string.

void clear ( ) #

Clears the canvas widget: deletes all drawn lines, polygons and text.

void clearLineIndices ( int line ) #

Clears the array of indices set for points that form the given line.

Arguments

• int line - Canvas element ID of the line.

void clearLinePoints ( int line ) #

Deletes all points that make up a given line.

Arguments

• int line - Canvas element ID of the line.

void clearPolygonIndices ( int polygon ) #

Clears the array of indices set for points that form the given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

void clearPolygonPoints ( int polygon ) #

Deletes all points that make up a given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

void removeLine ( int line ) #

Removes the line from the canvas widget.

Arguments

• int line - Canvas element ID of the line.

void removeLineIndex ( int line, int num ) #

Removes the index with the given number from the array of the line indices.

Arguments

• int line - Canvas element ID of the line.
• int num - The number of the index in the array of the line indices.

void removeLinePoint ( int line, int num ) #

Removes the segment of the line from the canvas widget.

Arguments

• int line - Canvas element ID of the line.
• int num - Number of the point to remove.

void removePolygon ( int polygon ) #

Removes the polygon from the canvas widget.

Arguments

• int polygon - Canvas element ID of the polygon.

void removePolygonIndex ( int polygon, int num ) #

Removes the index with the given number from the array of the polygon indices.

Arguments

• int polygon - Canvas element ID of the polygon.
• int num - The number of the index in the array of the polygon indices.

void removePolygonPoint ( int polygon, int num ) #

Removes the point of the polygon from the canvas widget.

Arguments

• int polygon - Canvas element ID of the polygon.
• int num - Polygon point coordinates.

void removeText ( int text ) #

Removes the text from the canvas widget.

Arguments

• int text - Canvas element ID of the text string.

void setPolygonGPUTexture ( int polygon, const Ptr<Texture> & texture ) #

Sets a GPU texture for the given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.
• const Ptr<Texture> & texture - GPU texture

Ptr<Texture> getPolygonGPUTexture ( int polygon ) const#

Returns the current GPU texture for the given polygon.

Arguments

• int polygon - Canvas element ID of the polygon.

Return value

GPU texture

void setTextPixelPerfect ( int text, bool pixel_perfect ) #

Sets the text with the given ID as pixel perfect.

Arguments

• int text - ID of the text.
• bool pixel_perfect - true to make the text pixel perfect, otherwise, false.

bool getTextPixelPerfect ( int text ) const#

Returns a value indicating if the text with the given ID is pixel perfect.

Arguments

• int text - ID of the text.

Return value

true if the text is pixel perfect, otherwise, false.

void setPolygonIntersection ( int polygon, bool intersection ) #

Specifies whether the polygon with the given ID will participate in the intersection check.

Arguments

• int polygon - ID of the polygon.
• bool intersection - true to make the polygon participate in the intersection check, otherwise, false.

bool isPolygonIntersection ( int polygon ) const#

Returns a value indicating if the polygon with the given ID participates in the intersection check.

Arguments

• int polygon - ID of the polygon.

Return value

true if the polygon participates in the intersection check, otherwise, false.

void setPolygonRender ( int polygon, bool render ) #

Sets the rendering state for the polygon with the given ID.

Arguments

• int polygon - ID of the polygon.
• bool render - true to render the polygon, otherwise, false.

bool isPolygonRender ( int polygon ) const#

Returns a value indicating if the polygon with the given ID is rendered.

Arguments

• int polygon - ID of the polygon.

Return value

true if the polygon is rendered, otherwise, false.