Package icyllis.arc3d.granite.geom

Class CircleProcessor

java.lang.Object

icyllis.arc3d.granite.GeometryStep

icyllis.arc3d.granite.geom.CircleProcessor

public class CircleProcessor
extends GeometryStep

The output of this effect is a modulation of the input color and coverage for a circle. It operates in a space normalized by the circle radius (outer radius in the case of a stroke) with origin at the circle center. Three vertex/instance attributes are used:

• vec2 : position in local space of the bounding geometry vertices
• vec4 : (p.xy, outerRad, innerRad) p is the position in the normalized local space. outerRad is the outerRadius in local space. innerRad is the innerRadius in normalized local space (ignored if not stroking).
• vec4 : color

Additional clip planes are supported for rendering circular arcs. The additional planes are either intersected or unioned together. Up to three planes are supported (an initial plane, a plane intersected with the initial plane, and a plane unioned with the first two). Only two are useful for any given arc, but having all three in one instance allows combining different types of arcs. Round caps for stroking are allowed as well. The caps are specified as two circle center points in the same space as p.xy.

Nested Class Summary

Nested classes/interfaces inherited from class icyllis.arc3d.granite.GeometryStep

GeometryStep.ProgramImpl

Field Summary

Fields

Modifier and Type	Field	Description
static final VertexInputLayout.Attribute	CIRCLE_EDGE
static final VertexInputLayout.Attribute	CLIP_PLANE	Per-instance attributes (optional).
static final VertexInputLayout.Attribute	COLOR	Per-instance attributes.
static final VertexInputLayout.AttributeSet	INSTANCE_FORMAT
static final VertexInputLayout.Attribute	ISECT_PLANE	Per-instance attributes (optional).
static final VertexInputLayout.Attribute	MODEL_VIEW
static final VertexInputLayout.Attribute	POSITION	Per-vertex attributes.
static final VertexInputLayout.Attribute	ROUND_CAP_CENTERS	Per-instance attributes (optional).
static final VertexInputLayout.Attribute	UNION_PLANE	Per-instance attributes (optional).
static final VertexInputLayout.AttributeSet	VERTEX_FORMAT

Fields inherited from class icyllis.arc3d.granite.GeometryStep

DEPTH, FLAG_EMIT_COVERAGE, FLAG_EMIT_PRIMITIVE_COLOR, FLAG_HANDLE_SOLID_COLOR, FLAG_HAS_TEXTURES, FLAG_OUTSET_BOUNDS_FOR_AA, FLAG_PERFORM_SHADING, SOLID_COLOR

Constructor Summary

Constructors

Constructor	Description
CircleProcessor(boolean stroke, boolean clipPlane, boolean isectPlane, boolean unionPlane, boolean roundCaps)

Method Summary

Modifier and Type	Method	Description
void	appendToKey(KeyBuilder b)	Appends a key on the KeyBuilder that reflects any variety in the code that the geometry processor subclass can emit.
GeometryStep.ProgramImpl	makeProgramImpl(ShaderCaps caps)	Returns a new instance of the appropriate implementation class for the given GeometryProcessor.

Methods inherited from class icyllis.arc3d.granite.GeometryStep

appendAttributesToKey, depthStencilFlags, depthStencilSettings, emitFragmentColorCode, emitFragmentCoverageCode, emitSamplers, emitsCoverage, emitsPrimitiveColor, emitUniforms, emitVaryings, emitVertexGeomCode, getInputLayout, handlesSolidColor, hasInstanceAttributes, hasVertexAttributes, instanceAttributes, instanceBinding, instanceStride, makeColorAttribute, name, numInstanceAttributes, numInstanceLocations, numTextureSamplers, numVertexAttributes, numVertexLocations, performsShading, primitiveType, textureSamplerState, textureSamplerSwizzle, uniqueID, vertexAttributes, vertexBinding, vertexStride, writeMesh, writeUniformsAndTextures

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

POSITION

public static final VertexInputLayout.Attribute POSITION

Per-vertex attributes.

CIRCLE_EDGE

public static final VertexInputLayout.Attribute CIRCLE_EDGE

COLOR

public static final VertexInputLayout.Attribute COLOR

Per-instance attributes.

CLIP_PLANE

public static final VertexInputLayout.Attribute CLIP_PLANE

Per-instance attributes (optional).

ISECT_PLANE

public static final VertexInputLayout.Attribute ISECT_PLANE

Per-instance attributes (optional).

UNION_PLANE

public static final VertexInputLayout.Attribute UNION_PLANE

Per-instance attributes (optional).

ROUND_CAP_CENTERS

public static final VertexInputLayout.Attribute ROUND_CAP_CENTERS

Per-instance attributes (optional).

MODEL_VIEW

public static final VertexInputLayout.Attribute MODEL_VIEW

VERTEX_FORMAT

public static final VertexInputLayout.AttributeSet VERTEX_FORMAT

INSTANCE_FORMAT

public static final VertexInputLayout.AttributeSet INSTANCE_FORMAT

Constructor Details

CircleProcessor

public CircleProcessor(boolean stroke,
 boolean clipPlane,
 boolean isectPlane,
 boolean unionPlane,
 boolean roundCaps)

Method Details

appendToKey

public void appendToKey(@Nonnull
 KeyBuilder b)

Description copied from class: GeometryStep

Appends a key on the KeyBuilder that reflects any variety in the code that the geometry processor subclass can emit.

Specified by:

appendToKey in class GeometryStep

See Also:

• GeometryStep.makeProgramImpl(ShaderCaps)

makeProgramImpl

@Nonnull
public GeometryStep.ProgramImpl makeProgramImpl(ShaderCaps caps)

Description copied from class: GeometryStep

Returns a new instance of the appropriate implementation class for the given GeometryProcessor. This method is called only when the specified key does not exist in the program cache.

Specified by:

makeProgramImpl in class GeometryStep

See Also:

• GeometryStep.appendToKey(KeyBuilder)