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java.lang.Objectcom.badlogic.gdx.graphics.glutils.ShapeRenderer
public class ShapeRenderer
Renders points, lines, rectangles, filled rectangles and boxes. This class is not meant to be used for performance sensitive applications but more oriented towards debugging.
This class works with OpenGL ES 1.x and 2.0. In its base configuration a 2D orthographic projection with the origin in the lower left corner is used. Units are given in screen pixels. To change the projection properties use thesetProjectionMatrix(Matrix4)
method. Usually the Camera.combined
matrix is set via this method. If the screen orientation or resolution changes, the projection matrix might have to be adapted
as well.
Shapes are rendered in batches to increase performance. The standard use-pattern looks as follows:
camera.update();
shapeRenderer.setProjectionMatrix(camera.combined);
shapeRenderer.begin(ShapeType.Line);
shapeRenderer.color(1, 1, 0, 1);
shapeRenderer.line(x, y, x2, y2);
shapeRenderer.line(x3, y3, x4, y4);
shapeRenderer.end();
shapeRenderer.begin(ShapeType.Box);
shapeRenderer.color(0, 1, 0, 1);
shapeRenderer.box(x, y, z, width, height, depth);
shapeRenderer.end();
The class has a second matrix called the transformation matrix which is used to rotate, scale and translate shapes in a more
flexible manner. This mechanism works much like matrix operations in OpenGL ES 1.x. The following example shows how to rotate a
rectangle around its center using the z-axis as the rotation axis and placing it's center at (20, 12, 2):
shapeRenderer.begin(ShapeType.Rectangle); shapeRenderer.identity(); shapeRenderer.translate(20, 12, 2); shapeRenderer.rotate(0, 0, 1, 90); shapeRenderer.rect(-width / 2, -height / 2, width, height); shapeRenderer.end();Matrix operations all use postmultiplication and work just like glTranslate, glScale and glRotate. The last transformation specified will be the first that is applied to a shape (rotate then translate in the above example). The projection and transformation matrices are a state of the ShapeRenderer, just like the color and will be applied to all shapes until they are changed.
Nested Class Summary | |
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static class |
ShapeRenderer.ShapeType
Shape types to be used with begin(ShapeType) . |
Constructor Summary | |
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ShapeRenderer()
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ShapeRenderer(int maxVertices)
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Method Summary | |
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void |
begin(ShapeRenderer.ShapeType type)
Starts a new batch of shapes. |
void |
box(float x,
float y,
float z,
float width,
float height,
float depth)
Draws a box. |
void |
circle(float x,
float y,
float radius)
Calls circle(float, float, float, int) by estimating the number of segments needed for a smooth circle. |
void |
circle(float x,
float y,
float radius,
int segments)
|
void |
dispose()
|
void |
end()
Finishes the batch of shapes and ensures they get rendered. |
void |
filledCircle(float x,
float y,
float radius)
Calls filledCircle(float, float, float, int) by estimating the number of segments needed for a smooth circle. |
void |
filledCircle(float x,
float y,
float radius,
int segments)
|
void |
filledRect(float x,
float y,
float width,
float height)
Draws a filled rectangle in the x/y plane. |
void |
filledRect(float x,
float y,
float width,
float height,
Color c1,
Color c2,
Color c3,
Color c4)
Draws a filled rectangle in the x/y plane. |
void |
filledTriangle(float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
|
void |
flush()
|
void |
identity()
Sets the transformation matrix to identity. |
void |
line(float x,
float y,
float x2,
float y2)
Draws a line in the x/y plane. |
void |
line(float x,
float y,
float z,
float x2,
float y2,
float z2)
Draws a line. |
void |
point(float x,
float y,
float z)
Draws a point. |
void |
rect(float x,
float y,
float width,
float height)
Draws a rectangle in the x/y plane. |
void |
rotate(float axisX,
float axisY,
float axisZ,
float angle)
Multiplies the current transformation matrix by a rotation matrix. |
void |
scale(float scaleX,
float scaleY,
float scaleZ)
Multiplies the current transformation matrix by a scale matrix. |
void |
setColor(Color color)
Sets the Color to be used by shapes. |
void |
setColor(float r,
float g,
float b,
float a)
Sets the Color to be used by shapes. |
void |
setProjectionMatrix(Matrix4 matrix)
Sets the projection matrix to be used for rendering. |
void |
setTransformMatrix(Matrix4 matrix)
|
void |
translate(float x,
float y,
float z)
Multiplies the current transformation matrix by a translation matrix. |
void |
triangle(float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ShapeRenderer()
public ShapeRenderer(int maxVertices)
Method Detail |
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public void setColor(Color color)
Color
to be used by shapes.
color
- public void setColor(float r, float g, float b, float a)
Color
to be used by shapes.
r
- g
- b
- a
- public void setProjectionMatrix(Matrix4 matrix)
Camera.combined
.
matrix
- public void setTransformMatrix(Matrix4 matrix)
public void identity()
public void translate(float x, float y, float z)
x
- y
- z
- public void rotate(float axisX, float axisY, float axisZ, float angle)
angle
- angle in degreesaxisX
- axisY
- axisZ
- public void scale(float scaleX, float scaleY, float scaleZ)
scaleX
- scaleY
- scaleZ
- public void begin(ShapeRenderer.ShapeType type)
ShapeRenderer.ShapeType.Point
is specified, only call #point().
The call to this method must be paired with a call to end()
.
In case OpenGL ES 1.x is used, the projection and modelview matrix will be modified.
type
- the ShapeRenderer.ShapeType
.public void point(float x, float y, float z)
ShapeRenderer.ShapeType
passed to begin has to be ShapeRenderer.ShapeType.Point
.
x
- y
- z
- public void line(float x, float y, float z, float x2, float y2, float z2)
ShapeRenderer.ShapeType
passed to begin has to be ShapeRenderer.ShapeType.Line
.
x
- y
- z
- x2
- y2
- z2
- public void line(float x, float y, float x2, float y2)
ShapeRenderer.ShapeType
passed to begin has to be ShapeRenderer.ShapeType.Line
.
x
- y
- x2
- y2
- public void rect(float x, float y, float width, float height)
ShapeRenderer.ShapeType
passed to begin has to be ShapeRenderer.ShapeType.Rectangle
.
x
- y
- width
- height
- public void filledRect(float x, float y, float width, float height)
ShapeRenderer.ShapeType
passed to begin has to be ShapeRenderer.ShapeType.FilledRectangle
.
x
- y
- width
- height
- public void filledRect(float x, float y, float width, float height, Color c1, Color c2, Color c3, Color c4)
ShapeRenderer.ShapeType
passed to begin has to be ShapeRenderer.ShapeType.FilledRectangle
. The 4 color parameters
specify the color for the bottom left, bottom right, top right and top left corner of the rectangle, allowing
you to create gradients.
x
- y
- width
- height
- public void box(float x, float y, float z, float width, float height, float depth)
ShapeRenderer.ShapeType
passed
to begin has to be ShapeRenderer.ShapeType.Box
.
x
- y
- width
- height
- public void circle(float x, float y, float radius)
circle(float, float, float, int)
by estimating the number of segments needed for a smooth circle.
public void circle(float x, float y, float radius, int segments)
public void filledCircle(float x, float y, float radius)
filledCircle(float, float, float, int)
by estimating the number of segments needed for a smooth circle.
public void filledCircle(float x, float y, float radius, int segments)
public void triangle(float x1, float y1, float x2, float y2, float x3, float y3)
public void filledTriangle(float x1, float y1, float x2, float y2, float x3, float y3)
public void end()
public void flush()
public void dispose()
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