Adding More Camera Behaviors — Handmade Hero — Episode Guide

0:08Recap and set the stage for the day

1:48Run the game to see how the camera is working and consider introducing the notion of camera movement while lingering

5:59handmade_sim_region.cpp: Begin to enable UpdateCameraForEntityMovement() to move the camera gradually towards a target

7:15A few words on the commonness in games of moving gradually to a target

8:12handmade_sim_region.cpp: Make UpdateCameraForEntityMovement() set the camera's target

10:05Run the game to see no camera movement

10:37handmade_sim_region.cpp: Enable UpdateCameraForEntityMovement() to snap the camera to its target

14:05Run the game to see the camera snap between locations

14:19handmade_sim_region.cpp: Enable UpdateCameraForEntityMovement() to gradually drive the camera from its current location to its target

14:45Run the game to see that camera interpolation in action

15:05Blackboard: Moving along a vector by a simplified rate

21:19Run the game to show the constant velocity of the camera

21:47Blackboard: Prentending that our velocity is encoded in the length of p

24:02Blackboard: Computing instantaneous velocity, without acceleration, using a resolved rate equation

27:57Run the game and determine to move the camera when lingering

28:33handmade_entity.h: Add CameraBehavior to the entity struct

29:41handmade_sim_region.cpp: Begin to enable UpdateCameraForEntityMovement() to handle camera behaviors

30:35handmade_world_mode.cpp: Make AddStandardRoom() generate a CollisionVolume near the hole to trigger camera movement

34:22Run the game and try triggering that CollisionVolume

34:48handmade_sim_region.cpp: Introduce the notion of a SpecialCamera, and make UpdateCameraForEntityMovement() handle it on a timer

39:02Run the game to try out the timed triggering

39:54handmade_sim_region.cpp: Enable UpdateCameraForEntityMovement() to zoom the SpecialCamera

44:24Run the game to see that timed camera movement with zoom, and tweak the movement

46:58handmade_sim_region.cpp: Make UpdateCameraForEntityMovement() only trigger the camera movement when the hero is not moving

48:45Run the game to try the camera, and determine to create a camera movement for the stairwell

50:26handmade_world_mode.cpp: Prevent AddStandardRoom() from randomising the stair positions

58:25Run the game to see our even stairwell, and tweak its dimensions

1:04:22handmade_world_mode.cpp: Enable AddStandardRoom() to generate the stair tiles separately from the hole generation

1:06:33Run the game to try out our wider stairwell, and tweak it

1:10:34handmade_world_mode.cpp: Define the two StairsCam CollisionVolumes in AddStandardRoom()

1:17:31Run the game and determine to create movement logic

1:18:42handmade_sim_region.cpp: Implement some velocity constraints for the SpecialCamera in UpdateCameraForEntityMovement()

1:32:45handmade_math.h: Introduce IsInRange()

1:33:39handmade_sim_region.cpp: Enable UpdateCameraForEntityMovement() to distinguish between a Player and an Area camera

1:35:25Run the game to try out those cameras

1:36:03handmade_entity.h: Introduce the notion of a CameraMinTime in entity

1:37:16Run the game to try out the timers

1:37:37handmade_world_mode.cpp: Set GeneralVelocityConstraints for the HoleCam and StairsCam

1:42:14Run the game to try triggering the StairsCam, and investigate the snapping

1:48:53handmade_world_mode.cpp: Determine to enable UpdateAndRenderWorld() to correctly update the camera position when changing sim region

1:57:17Q&A

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1:57:17Q&A

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1:57:17Q&A

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1:57:52sahfortv There seems to be a second problem with StairCam 1 vs StairCam 2, i.e. you need to be moving even though you're on the first stair, so the collision areas are out a bit?

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1:57:52sahfortv There seems to be a second problem with StairCam 1 vs StairCam 2, i.e. you need to be moving even though you're on the first stair, so the collision areas are out a bit?

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1:57:52sahfortv There seems to be a second problem with StairCam 1 vs StairCam 2, i.e. you need to be moving even though you're on the first stair, so the collision areas are out a bit?

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1:58:38rooctag Why are the trees below smaller than the trees up top?

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1:58:38rooctag Why are the trees below smaller than the trees up top?

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1:58:38rooctag Why are the trees below smaller than the trees up top?

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2:01:36butwhynot1 Are you going to experiment zooming by changing the FOV rather than changing the distance?

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2:01:36butwhynot1 Are you going to experiment zooming by changing the FOV rather than changing the distance?

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2:01:36butwhynot1 Are you going to experiment zooming by changing the FOV rather than changing the distance?

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2:02:09macielda Why use velocity and not, for instance, acceleration as a constraint parameter?

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2:02:09macielda Why use velocity and not, for instance, acceleration as a constraint parameter?

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2:02:09macielda Why use velocity and not, for instance, acceleration as a constraint parameter?

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2:02:43m0re85 Why are the health bars flickering? Seems to be most noticeable when the hero is at standstill (the familiars move all the time and they don't flicker as much)

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2:02:43m0re85 Why are the health bars flickering? Seems to be most noticeable when the hero is at standstill (the familiars move all the time and they don't flicker as much)

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2:02:43m0re85 Why are the health bars flickering? Seems to be most noticeable when the hero is at standstill (the familiars move all the time and they don't flicker as much)

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2:03:30handmade_entity.cpp: Enable DrawHitpoints() to prevent Z-fighting

2:04:19radovik Off-topic: Is it normal for a trivial code change to lead to a 250MB diff file? Is this optimization / MIPS architecture weirdness?

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2:04:19radovik Off-topic: Is it normal for a trivial code change to lead to a 250MB diff file? Is this optimization / MIPS architecture weirdness?

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2:04:19radovik Off-topic: Is it normal for a trivial code change to lead to a 250MB diff file? Is this optimization / MIPS architecture weirdness?

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2:05:18rooctag What do you want to fit in the camera view? Whole room, or some amount of tiles so camera movement per room is needed

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2:05:18rooctag What do you want to fit in the camera view? Whole room, or some amount of tiles so camera movement per room is needed

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2:05:18rooctag What do you want to fit in the camera view? Whole room, or some amount of tiles so camera movement per room is needed

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2:05:53ahoward1024 Hey Casey, in the PushBitmap function of the handmade_render_group you have a shadowed v4 parameter Color that is masked by the u32 Color. Compiles as a warning (to an error) in VS 2015

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2:05:53ahoward1024 Hey Casey, in the PushBitmap function of the handmade_render_group you have a shadowed v4 parameter Color that is masked by the u32 Color. Compiles as a warning (to an error) in VS 2015

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2:05:53ahoward1024 Hey Casey, in the PushBitmap function of the handmade_render_group you have a shadowed v4 parameter Color that is masked by the u32 Color. Compiles as a warning (to an error) in VS 2015

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2:07:21handmade_render_group.cpp: Move in PushSetup() and transient_clip_rect from handmade_render_group.h¹

2:09:19teamrandb Does the profiler still work? If not, what is a quick overview of the work that is needed to get it working again? And was it purely a display issue that we could not see it?

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2:09:19teamrandb Does the profiler still work? If not, what is a quick overview of the work that is needed to get it working again? And was it purely a display issue that we could not see it?

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2:09:19teamrandb Does the profiler still work? If not, what is a quick overview of the work that is needed to get it working again? And was it purely a display issue that we could not see it?

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2:10:40handmade_render_group.cpp: Fix GetClipRect() to correctly clip the profiler's text

2:15:39handmade_render_group.cpp: Introduce GetScreenPoint() for GetClipRect() to call

2:19:11Run the game to see that it's getting closer to working

2:20:03Blackboard: Mapping screen dimensions to -1 to 1

2:22:18handmade_opengl.cpp: Try disabling the ClipRect bounds setting

2:26:33Run the game to see what's going on with the clipping

2:28:09teamrandb Thanks Casey, appreciate you walking through it

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2:28:09teamrandb Thanks Casey, appreciate you walking through it

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2:28:09teamrandb Thanks Casey, appreciate you walking through it

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2:28:44handmade_render_group.cpp: Temporarily prevent the clipping from occuring and run the game to see that

2:29:41macielda Can you click "Threads" on the Profile window?

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2:29:41macielda Can you click "Threads" on the Profile window?

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2:29:41macielda Can you click "Threads" on the Profile window?

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2:31:15macielda Is the mouse over text working now?

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2:31:15macielda Is the mouse over text working now?

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2:31:15macielda Is the mouse over text working now?

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2:31:55Sign off

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2:31:55Sign off

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2:31:55Sign off

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