diff options
Diffstat (limited to 'examples/point_triangle_collision')
| -rw-r--r-- | examples/point_triangle_collision/main.lua | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/examples/point_triangle_collision/main.lua b/examples/point_triangle_collision/main.lua deleted file mode 100644 index 9a302dc..0000000 --- a/examples/point_triangle_collision/main.lua +++ /dev/null @@ -1,120 +0,0 @@ -package.path = package.path..";"..RL.GetBasePath().."../resources/lib/?.lua" - -util = require "utillib" -Vec2 = require "vector2" -Vec3 = require "vector3" - -local MOVE_SPEED = 0.5 - -local monitor = 0 -local camera = -1 -local tri = { - a = Vec3:new( 0, 0, 0 ), - -- a = Vec3:new( 0, 1, 0 ), - b = Vec3:new( 0, 0, 2 ), - c = Vec3:new( 1, 0, 0 ), - normal = Vec3:new( 0, 0, 0 ), -} -local point = { - pos = Vec3:new( 0.2, 0.3, 0.2 ), - radius = 0.05, - lineLen = 0.5, - color = RL.RED, -} - -local debugText = "" - -local function calcNormal( tri ) - tri.normal = Vec3:new( RL.Vector3Normalize( RL.Vector3CrossProduct( tri.b - tri.a, tri.c - tri.a ) ) ) -end - -function RL.init() - local mPos = RL.GetMonitorPosition( monitor ) - local mSize = RL.GetMonitorSize( monitor ) - local winSize = { 1920, 1080 } - - RL.SetWindowState( RL.FLAG_WINDOW_RESIZABLE ) - RL.SetWindowState( RL.FLAG_VSYNC_HINT ) - RL.SetWindowPosition( { mPos[1] + mSize[1] / 2 - winSize[1] / 2, mPos[2] + mSize[2] / 2 - winSize[2] / 2 } ) - RL.SetWindowSize( winSize ) - camera = RL.CreateCamera3D() - RL.SetCamera3DPosition( camera, { 0, 1, 2 } ) - RL.SetCamera3DTarget( camera, { 0, 0, 0 } ) - RL.SetCamera3DUp( camera, { 0, 1, 0 } ) - - calcNormal( tri ) -end - -local function checkCollisionPointTriangle( p, a, b, c, n ) - local result = Vec3:new( 0, 0, 0 ) - - local v0 = Vec3:new( b.x - a.x, b.y - a.y, b.z - a.z ) -- Vector3Subtract( b, a ) - local v1 = Vec3:new( c.x - a.x, c.y - a.y, c.z - a.z ) -- Vector3Subtract( c, a ) - local v2 = Vec3:new( p.x - a.x, p.y - a.y, p.z - a.z ) -- Vector3Subtract( p, a ) - local d00 = v0.x * v0.x + v0.y * v0.y + v0.z * v0.z -- Vector3DotProduct( v0, v0 ) - local d01 = v0.x * v1.x + v0.y * v1.y + v0.z * v1.z -- Vector3DotProduct( v0, v1 ) - local d11 = v1.x * v1.x + v1.y * v1.y + v1.z * v1.z -- Vector3DotProduct( v1, v1 ) - local d20 = v2.x * v0.x + v2.y * v0.y + v2.z * v0.z -- Vector3DotProduct( v2, v0 ) - local d21 = v2.x * v1.x + v2.y * v1.y + v2.z * v1.z -- Vector3DotProduct( v2, v1 ) - - local denom = d00 * d11 - d01 * d01 - local distance = v2.x * n.x + v2.y * n.y + v2.z * n.z -- Vector3DotProduct( v2, n ) - - debugText = debugText.."distance "..distance.."\n" - debugText = debugText.."v0 "..v0.x..", "..v0.y..", "..v0.z.."\n" - debugText = debugText.."v1 "..v1.x..", "..v1.y..", "..v1.z.."\n" - debugText = debugText.."v2 "..v2.x..", "..v2.y..", "..v2.z.."\n" - - result.y = ( d11 * d20 - d01 * d21) / denom - result.z = ( d00 * d21 - d01 * d20) / denom - result.x = 1.0 - ( result.z + result.y ) - - debugText = debugText.."result "..result.x..", "..result.y..", "..result.z.."\n" - - return 0.0 < result.x and 0.0 < result.y and 0.0 < result.z and distance < 0.0, distance -end - -function RL.process( delta ) - debugText = "" - - if RL.IsKeyDown( string.byte( "D" ) ) then - point.pos.x = point.pos.x + MOVE_SPEED * delta - elseif RL.IsKeyDown( string.byte( "A" ) ) then - point.pos.x = point.pos.x - MOVE_SPEED * delta - end - if RL.IsKeyDown( string.byte( "S" ) ) then - point.pos.z = point.pos.z + MOVE_SPEED * delta - elseif RL.IsKeyDown( string.byte( "W" ) ) then - point.pos.z = point.pos.z - MOVE_SPEED * delta - end - if RL.IsKeyDown( string.byte( "R" ) ) then - point.pos.y = point.pos.y + MOVE_SPEED * delta - elseif RL.IsKeyDown( string.byte( "F" ) ) then - point.pos.y = point.pos.y - MOVE_SPEED * delta - end - - if checkCollisionPointTriangle( point.pos, tri.a, tri.b, tri.c, tri.normal ) then - point.color = RL.RED - else - point.color = RL.GREEN - end -end - -function RL.draw() - RL.ClearBackground( { 100, 150, 100 } ) - - RL.BeginMode3D( camera ) - RL.DrawGrid( 8, 1 ) - RL.DrawTriangle3D( tri.a, tri.b, tri.c, { 200, 100, 100 } ) - - RL.DrawLine3D( { point.pos.x - point.lineLen, point.pos.y, point.pos.z }, - { point.pos.x + point.lineLen, point.pos.y, point.pos.z }, RL.BLUE ) - RL.DrawLine3D( { point.pos.x, point.pos.y - point.lineLen, point.pos.z }, - { point.pos.x, point.pos.y + point.lineLen, point.pos.z }, RL.BLUE ) - RL.DrawLine3D( { point.pos.x, point.pos.y, point.pos.z - point.lineLen }, - { point.pos.x, point.pos.y, point.pos.z + point.lineLen }, RL.BLUE ) - RL.DrawSphereWires( point.pos, point.radius, 3, 8, point.color ) - RL.EndMode3D() - - RL.DrawText( RL.defaultFont, debugText, { 10, 10 }, 30, 4, RL.WHITE ) -end |