// v0 - v1
// | \ |
// v3 - v2
public static bool Raycast(TpSprite *self, float x, float y)
{
float *verts = self->verts;
float v0x = verts[0], v0y = verts[1], v1x = verts[2], v1y = verts[3];
float v2x = verts[4], v2y = verts[5], v3x = verts[6], v3y = verts[7];
float area = Area(v0x, v0y, v1x, v1y, v2x, v2y) + Area(v0x, v0y, v2x, v2y, v3x, v3y);
float sum = Area(x, y, v0x, v0y, v1x, v1y);
// UnityEngine.Debug.LogFormat("{2} cast {0} {1}, area {3} sum1 {4}", x, y, self->id, area, sum);
if (sum > area)
{
return(false);
}
sum += Area(x, y, v1x, v1y, v2x, v2y);
// UnityEngine.Debug.LogFormat("\t{2} area {3} sum2 {4}", x, y, self->id, area, sum);
if (sum > area)
{
return(false);
}
sum += Area(x, y, v2x, v2y, v3x, v3y);
// UnityEngine.Debug.LogFormat("\t{2} area {3} sum3 {4}", x, y, self->id, area, sum);
if (sum > area)
{
return(false);
}
sum += Area(x, y, v3x, v3y, v0x, v0y);
// UnityEngine.Debug.LogFormat("\t{2} area {3} sum4 {4}", x, y, self->id, area, sum);
if (sum > area)
{
return(false);
}
// UnityEngine.Debug.LogFormat("{2} hit", x, y, self->id);
return(true);
}
public static void SetTint(TpSprite *self, float r, float g, float b)
{
#if FDB
Should.NotNull("self", self);
Should.TypeEqual("self", self->type, Type);
#endif
Vec3.Set(self->color, r, g, b);
}
public static void SetAlpha(TpSprite *self, float a)
{
#if FDB
Should.NotNull("self", self);
Should.TypeEqual("self", self->type, Type);
#endif
self->color[3] = a;
}
public static void SetScale(TpSprite *self, float x, float y)
{
#if FDB
Should.NotNull("self", self);
Should.TypeEqual("self", self->type, Type);
#endif
Vec2.Set(self->scl, x, y);
self->isTransformDirty = true;
}
public static void SetRotation(TpSprite *self, float rotation)
{
#if FDB
Should.NotNull("self", self);
Should.TypeEqual("self", self->type, Type);
#endif
self->rot = rotation;
self->isTransformDirty = true;
}
public static void SetPosition(TpSprite *self, float x, float y, float z)
{
#if FDB
Should.NotNull("self", self);
Should.TypeEqual("self", self->type, Type);
#endif
Vec3.Set(self->pos, x, y, z);
self->isTransformDirty = true;
}
public static void Draw(TpSprite *self, float *parentMat, bool isParentTransformDirty)
{
#if FDB
Should.NotNull("self", self);
Should.TypeEqual("self", self->type, Type);
Should.NotNull("self->spriteMeta", self->spriteMeta);
#endif
var bat = DrawCtx.GetBatch(self->spriteMeta->atlas->name);
int vertIdx = bat.vertCount, triIdx = bat.triCount;
bat.RequestQuota(4, 6);
float *verts = self->verts;
float *uvs = self->uvs;
if (self->isTransformDirty)
{
float *mat = stackalloc float[6];
Mat2D.FromScalingRotationTranslation(mat, self->pos, self->scl, self->rot);
TpSpriteMeta.FillQuad(self->spriteMeta, mat, self->verts);
}
var bVerts = bat.verts; var bUvs = bat.uvs;
float z = self->pos[2];
bVerts[vertIdx].Set(verts[0], verts[1], z);
bVerts[vertIdx + 1].Set(verts[2], verts[3], z);
bVerts[vertIdx + 2].Set(verts[4], verts[5], z);
bVerts[vertIdx + 3].Set(verts[6], verts[7], z);
bUvs[vertIdx].Set(uvs[0], uvs[1]);
bUvs[vertIdx + 1].Set(uvs[2], uvs[3]);
bUvs[vertIdx + 2].Set(uvs[4], uvs[5]);
bUvs[vertIdx + 3].Set(uvs[6], uvs[7]);
float *color = self->color;
var bColor = Vec4.Color(color, 0.5f);
var bColors = bat.colors;
bColors[vertIdx] = bColor;
bColors[vertIdx + 1] = bColor;
bColors[vertIdx + 2] = bColor;
bColors[vertIdx + 3] = bColor;
var bTris = bat.tris;
bTris[triIdx] = vertIdx;
bTris[triIdx + 1] = vertIdx + 1;
bTris[triIdx + 2] = vertIdx + 2;
bTris[triIdx + 3] = vertIdx;
bTris[triIdx + 4] = vertIdx + 2;
bTris[triIdx + 5] = vertIdx + 3;
}
public static void Init(TpSprite *self, TpSpriteMeta *spriteMeta)
{
#if FDB
Should.NotNull("self", self);
Should.NotNull("spriteMeta", spriteMeta);
self->type = Type;
#endif
self->tag = Tag.TpSprite;
Vec3.Zero(self->pos);
Vec2.One(self->scl);
self->rot = 0;
self->isTransformDirty = true; // delay regen verts to first Draw
Vec4.Set(self->color, 1, 1, 1, 0);
TpSpriteMeta.FillUvs(spriteMeta, self->uvs);
self->spriteMeta = spriteMeta;
}
public static void SetMeta(TpSprite *self, TpSpriteMeta *meta)
{
self->isTransformDirty = true;
TpSpriteMeta.FillUvs(meta, self->uvs);
self->spriteMeta = meta;
}
