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CSC 4356 FINAL PROJECT

CSC 4356 FINAL PROJECT. KEVIN CHERRY. Objective. Class Techniques Shadow Normal Map Point Sprite Water / Mirror Spot / Point Light Common Techniques Skycube HUD Joystick Camera Bob When Walking Sound Collision Detection Custom Techniques Water Fade Off. DEMO. Shadow.

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CSC 4356 FINAL PROJECT

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  1. CSC 4356 FINAL PROJECT KEVIN CHERRY

  2. Objective • Class Techniques • Shadow • Normal Map • Point Sprite • Water / Mirror • Spot / Point Light • Common Techniques • Skycube • HUD • Joystick • Camera Bob When Walking • Sound • Collision Detection • Custom Techniques • Water Fade Off

  3. DEMO

  4. Shadow • Uses code from notes • Able to render for multiple objects • Stores reversed view matrix in texture so I can get just model matrix in shader

  5. Normal Map • Uses function that copies image file to GL texture index • Diffuse and normal textures are handled in shader • Easy to implement and looks great!

  6. Point Sprite • Got starting code online • Structs • Sprite: GL texture unit, position, color, scale, texture coordinates • ASprite: Same but GL texture unit is array and texture count, texture index, swap delay, and swap counter added

  7. Point Sprite • Render • Creates x,y positions for four vertices • Binds sprite’s texture • Uses triangle strip and texture coordinates • Rendered last so texture’s alpha is blended with scene

  8. Point Sprite • ASprite for animation • 3 images swapped every 80 milliseconds

  9. Water • Same as in project 3 • Not as good looking though? • Perhaps needs more for it to refract?

  10. Mirror • Uses water reflection code • Tricky at first • Must flip over the clipping plane axis • This and reflection in water is the only time you can see player

  11. Spot / Point Light • Couldn’t get spotlight working • Instead objects lit by multiplying white vector based on camera distance in fragment shader • Light flickers with time to simulate fire from match • Light gradually takes effect as match comes up/down

  12. Skycube • Easy to add to scene, hard to get texture mapped right • Most sky cube textures online have small problems • Mapped in Wings and carefully touched up • Moves with player so player never escapes

  13. HUD • Had a lot of problems at first, but then realized a simple solution: • Pop any model tranformations • Reverse view transformations in opposite order • Perform HUD translations • Render

  14. Joystick • Uses glutJoystickFunc with poll interval of 15 • Uses unsigned int as bit mask for buttons • Works for any joystick (buttons will be different)

  15. Joystick • Problem: Glut only recognizes 3 axis • Solution: Glfw • In joystick mapped function, glfw used for 4 axis values • Axis values alter same code as mouse movement • Axis values [-1, 1] • Deadzone set to 0.2

  16. Joystick • Can switch from joystick to keyboard and mouse while game is running • Each switch resets movement values • Switches automatically to keyboard and mouse if joystick is disconnected

  17. Camera Bobbing • Common technique used in majority of games • Running increases bobbing rate • Increases a value as you walk • Uses sin of value converted to radians for y displacement

  18. Sound • Uses FMOD Ex • Used for footsteps • Triggered when y deviation is less than threshold

  19. Collision Detection • Checks camera’s position relative to custom 2D squares • Squares are expressed as center XZ position along with width and depth • If camera is within square • Check distance to all edges • Move to outside of that edge

  20. Water Fade Off • Without this, can see where water is cut by skycube • With it, water fades off and seems to continue off into the distance • Accomplished in shader

  21. What’s Left • More realistic water • More sounds • Background music? • Lens flare? • Recursive mirror rendering • More scenary

  22. Q & A

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