public static void FillUvs(TpSpriteMeta *self, float *uvs)
{
#if FDB
Should.NotNull("self", self);
Should.NotNull("uvs", uvs);
Should.TypeEqual("self", self->type, Type);
Should.NotNull("self->atlas", self->atlas);
Should.TypeEqual("self->atlas->type", self->atlas->type, TpAtlasMeta.Type);
#endif
float *size = self->atlas->size;
float invSizeX = 1 / size[0], invSizeY = 1 / size[1];
float *uv = self->uv;
float uvX = uv[0], uvY = uv[1], uvW = uv[2], uvH = uv[3];
if (self->rotated)
{
Vec2.Set(uvs, (uvX + uvW) * invSizeX, -uvY * invSizeY);
Vec2.Set(uvs + 2, (uvX + uvW) * invSizeX, (-uvY - uvH) * invSizeY);
Vec2.Set(uvs + 4, uvX * invSizeX, (-uvY - uvH) * invSizeY);
Vec2.Set(uvs + 6, uvX * invSizeX, -uvY * invSizeY);
}
else
{
Vec2.Set(uvs, uvX * invSizeX, -uvY * invSizeY);
Vec2.Set(uvs + 2, (uvX + uvW) * invSizeX, -uvY * invSizeY);
Vec2.Set(uvs + 4, (uvX + uvW) * invSizeX, (-uvY - uvH) * invSizeY);
Vec2.Set(uvs + 6, uvX * invSizeX, (-uvY - uvH) * invSizeY);
}
}
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;
}
// v0 - v1
// | \ |
// v3 - v2
public static void FillQuad(TpSpriteMeta *self, float *mat, float *verts)
{
#if FDB
Should.NotNull("self", self);
Should.NotNull("verts", verts);
Should.NotNull("mat", mat);
Should.TypeEqual("self", self->type, Type);
Should.NotNull("self->atlas", self->atlas);
Should.TypeEqual("self->atlas->type", self->atlas->type, TpAtlasMeta.Type);
#endif
float *pivot = self->pivot;
float pivotX = pivot[0], pivotY = pivot[1];
float *quad = self->quad;
float quadX = quad[0], quadY = quad[1], quadW = quad[2], quadH = quad[3];
Vec2.TransformMat2D(verts, mat, -pivotX + quadX, pivotY - quadY);
Vec2.TransformMat2D(verts + 2, mat, -pivotX + quadX + quadW, pivotY - quadY);
Vec2.TransformMat2D(verts + 4, mat, -pivotX + quadX + quadW, pivotY - quadY - quadH);
Vec2.TransformMat2D(verts + 6, mat, -pivotX + quadX, pivotY - quadY - quadH);
}
public static void SetMeta(TpSprite *self, TpSpriteMeta *meta)
{
self->isTransformDirty = true;
TpSpriteMeta.FillUvs(meta, self->uvs);
self->spriteMeta = meta;
}