Package icyllis.arc3d.granite.geom

Class AnalyticArcStep

java.lang.Object

icyllis.arc3d.granite.GeometryStep

icyllis.arc3d.granite.geom.AnalyticArcStep

public class AnalyticArcStep
extends GeometryStep

Analytic (SDF + HW derivatives) method to fill/stroke a butt/round/square stroked arc curve, a circular sector, or a circular segment. The join type may be square or round, for open arcs, and must be round for circular sector and circular segment. The arc must be circular, not elliptical.

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	FLAGS_AND_DEPTH	Bitfield: 16-32 bits: painter's depth; 4-5 bits: join; 2-4 bits: dir; join=0: round, join=1: miter; dir=0: inside, dir=1: center, dir=2: outside;
static final VertexInputLayout.AttributeSet	INSTANCE_ATTRIBS
static final VertexInputLayout.AttributeSet	INSTANCE_ATTRIBS_FOR_ARC
static final VertexInputLayout.Attribute	LOCAL_ARC	(center X, center Y, start angle, sweep angle)
static final VertexInputLayout.Attribute	RADII	X is circle radius. Y is stroke radius if stroked, or -1.0 if filled. Z is local AA radius.
static final VertexInputLayout.Attribute	RADII_ARC	W is half width for open arcs.

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, MODEL_VIEW, SOLID_COLOR

Constructor Summary

Constructors

Constructor	Description
AnalyticArcStep(int type)

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.
void	emitFragmentColorCode(Formatter fs, String outputColor)	Emits the fragment color code into the fragment shader.
void	emitFragmentCoverageCode(Formatter fs, String outputCoverage)	Emits the fragment coverage code into the fragment shader.
void	emitVaryings(VaryingHandler varyingHandler, boolean usesFastSolidColor)
void	emitVertexGeomCode(Formatter vs, String worldPosVar, String localPosVar, boolean usesFastSolidColor)	Emits the geometry code into the vertex shader.
GeometryStep.ProgramImpl	makeProgramImpl(ShaderCaps caps)	Returns a new instance of the appropriate implementation class for the given GeometryProcessor.
void	writeMesh(MeshDrawWriter writer, Draw draw, float[] solidColor, boolean mayRequireLocalCoords)

Methods inherited from class icyllis.arc3d.granite.GeometryStep

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

Methods inherited from class java.lang.Object

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

Field Details

LOCAL_ARC

public static final VertexInputLayout.Attribute LOCAL_ARC

(center X, center Y, start angle, sweep angle)

RADII

public static final VertexInputLayout.Attribute RADII

X is circle radius.
Y is stroke radius if stroked, or -1.0 if filled.
Z is local AA radius.

RADII_ARC

public static final VertexInputLayout.Attribute RADII_ARC

W is half width for open arcs.

FLAGS_AND_DEPTH

public static final VertexInputLayout.Attribute FLAGS_AND_DEPTH

Bitfield:
16-32 bits: painter's depth;
4-5 bits: join;
2-4 bits: dir;
join=0: round, join=1: miter;
dir=0: inside, dir=1: center, dir=2: outside;

INSTANCE_ATTRIBS

public static final VertexInputLayout.AttributeSet INSTANCE_ATTRIBS

INSTANCE_ATTRIBS_FOR_ARC

public static final VertexInputLayout.AttributeSet INSTANCE_ATTRIBS_FOR_ARC

Constructor Details

AnalyticArcStep

public AnalyticArcStep(int type)

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)

emitVaryings

public void emitVaryings(VaryingHandler varyingHandler,
 boolean usesFastSolidColor)

Overrides:

emitVaryings in class GeometryStep

emitVertexGeomCode

public void emitVertexGeomCode(Formatter vs,
 @Nonnull
 String worldPosVar,
 @Nullable
 String localPosVar,
 boolean usesFastSolidColor)

Description copied from class: GeometryStep

Emits the geometry code into the vertex shader. Implementation must define "vec4 worldPosVar" with the given name and setup it. If localPosVar is not null, then it must write geometry's local pos to it.

Overrides:

emitVertexGeomCode in class GeometryStep

emitFragmentColorCode

public void emitFragmentColorCode(Formatter fs,
 String outputColor)

Description copied from class: GeometryStep

Emits the fragment color code into the fragment shader. This is either paint's solid color or per-vertex primitive color. See GeometryStep.FLAG_HANDLE_SOLID_COLOR and GeometryStep.FLAG_EMIT_PRIMITIVE_COLOR.

Overrides:

emitFragmentColorCode in class GeometryStep

emitFragmentCoverageCode

public void emitFragmentCoverageCode(Formatter fs,
 String outputCoverage)

Description copied from class: GeometryStep

Emits the fragment coverage code into the fragment shader.

If GeometryStep.emitsCoverage() is false, this method is called for hard-edge coverage, discard the fragment if coverage is 0. Otherwise outputCoverage is non-null, and coverage will involve in blending operations.

Overrides:

emitFragmentCoverageCode in class GeometryStep

writeMesh

public void writeMesh(MeshDrawWriter writer,
 Draw draw,
 @Nullable
 float[] solidColor,
 boolean mayRequireLocalCoords)

Overrides:

writeMesh in class GeometryStep