# \#csd-unit-3-lesson-19

**URL:** https://forum.code.org/tag/csd-unit-3-lesson-19/392.md

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## [Irregular Sprite Collision Area](https://forum.code.org/t/irregular-sprite-collision-area/37446)

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**Author:** [@tjdavis](https://forum.code.org/u/tjdavis)\
**Replies:** 2\
**Last updated:** [January 12, 2023, 4:32pm UTC](https://forum.code.org/t/irregular-sprite-collision-area/37446 "2023-01-12T16:32:07Z")

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The type parameter for setCollider() can be “rectangle” or “circle”. Is there a way to set the collider area as another shape for sprite with a more irregular outline?

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## [Unit 3 Lesson 19](https://forum.code.org/t/unit-3-lesson-19/25844)

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**Author:** [@sevalmeshkov](https://forum.code.org/u/sevalmeshkov)\
**Replies:** 0\
**Last updated:** [March 24, 2019, 6:29am UTC](https://forum.code.org/t/unit-3-lesson-19/25844 "2019-03-24T06:29:50Z")

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Unit 3 Lesson 18 Lesson Plan with additional project and videos.

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## [3.19-Activity 11](https://forum.code.org/t/3-19-activity-11/15279)

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**Author:** [@bcunningham](https://forum.code.org/u/bcunningham)\
**Replies:** 8\
**Last updated:** [March 21, 2019, 12:35pm UTC](https://forum.code.org/t/3-19-activity-11/15279 "2019-03-21T12:35:42Z")

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My students and I are having some trouble with Activity 11. When we put the suggested code (If score\<10, simple background, else crazy background) in the draw loop with backgrounds that are sprites, the background cover…

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## [Code help with edges](https://forum.code.org/t/code-help-with-edges/22643)

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**Author:** [@lkeil](https://forum.code.org/u/lkeil)\
**Replies:** 3\
**Last updated:** [November 29, 2018, 12:32am UTC](https://forum.code.org/t/code-help-with-edges/22643 "2018-11-29T00:32:06Z")

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For lesson 19, yesterday I had two students try to draw a thin line (empty border as a sprite and place it at the edges then use if character is touching edge character bounce off edge This just made the sprite d…

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## [Struggling with this unit](https://forum.code.org/t/struggling-with-this-unit/14085)

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**Author:** [@sjreagin](https://forum.code.org/u/sjreagin)\
**Replies:** 1\
**Last updated:** [February 2, 2018, 5:42am UTC](https://forum.code.org/t/struggling-with-this-unit/14085 "2018-02-02T05:42:22Z")

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So I am doing this lesson now with my students. They are really struggling with it. This is a difficult concept for them. I am almost having to do it for them. I do feel like the instructions are weaker here. Maybe…

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## [Contents of video](https://forum.code.org/t/contents-of-video/13898)

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**Author:** [@gershon.ari](https://forum.code.org/u/gershon.ari)\
**Replies:** 1\
**Last updated:** [January 26, 2018, 6:04pm UTC](https://forum.code.org/t/contents-of-video/13898 "2018-01-26T18:04:54Z")

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I'm using the CSD sequence in a HS class. The video on functions refers to turtle movements, which is not covered in Discoveries Unit 3, so my students will be confused when I play the video next week. Where can I find t…