// createBodies sets up the chipmunk space and static bodies
func createBodies() {
space = chipmunk.NewSpace()
space.Gravity = vect.Vect{0, -900}
staticBody := chipmunk.NewBodyStatic()
staticLines = []*chipmunk.Shape{
chipmunk.NewSegment(vect.Vect{111.0, 280.0}, vect.Vect{407.0, 246.0}, 0),
chipmunk.NewSegment(vect.Vect{407.0, 246.0}, vect.Vect{407.0, 343.0}, 0),
}
for _, segment := range staticLines {
segment.SetElasticity(0.6)
staticBody.AddShape(segment)
}
space.AddBody(staticBody)
}
func newGround(x1, y1, x2, y2 float32) *ground {
ground := new(ground)
// Chipmunk body
ground.physicsBody = chipmunk.NewBodyStatic()
ground.physicsShape = chipmunk.NewSegment(
vect.Vect{vect.Float(x1), vect.Float(y1)},
vect.Vect{vect.Float(x2), vect.Float(y2)},
GroundRadius,
)
ground.physicsBody.AddShape(ground.physicsShape)
// OpenGL shape
ground.openglShape = shapes.NewSegment(x1, y1, x2, y2)
ground.openglShape.Color(color.White)
return ground
}
func (m *Map) GenerateCollision2() {
tilesy := make(map[int][]int)
tilesx := make(map[int][]int)
for x := 0; x < m.Width; x++ {
for y := 0; y < m.Height; y++ {
if t, e := m.GetTile(x, y); e {
if t.Collision() != CollisionNone {
tilesy[y] = append(tilesy[y], x)
tilesx[x] = append(tilesx[x], y)
}
}
}
}
var shapes []*chipmunk.Shape
centerx := vect.Float(m.TileSize * float32(m.Width) / 2)
centery := vect.Float(m.TileSize * float32(m.Height) / 2)
println("Map layer", m.Layer)
for y, xarr := range tilesy {
minx := xarr[0]
maxx := xarr[0]
sort.Ints(xarr)
for i := 1; i < len(xarr); i++ {
x := xarr[i]
if maxx+1 == x {
maxx = x
} else {
if maxx-minx > 1 {
shapes = append(shapes, chipmunk.NewSegment(
vect.Vect{vect.Float(float32(minx)*m.TileSize) - centerx, -vect.Float(float32(y)*m.TileSize) + centery},
vect.Vect{vect.Float(float32(maxx)*m.TileSize) - centerx, -vect.Float(float32(y)*m.TileSize) + centery},
1))
println(y, minx, maxx)
}
minx = x
maxx = x
}
}
if maxx-minx > 1 {
shapes = append(shapes, chipmunk.NewSegment(
vect.Vect{vect.Float(float32(minx)*m.TileSize) - centerx, -vect.Float(float32(y)*m.TileSize) + centery},
vect.Vect{vect.Float(float32(maxx)*m.TileSize) - centerx, -vect.Float(float32(y)*m.TileSize) + centery},
1))
println(y, minx, maxx)
}
}
for x, yarr := range tilesx {
miny := yarr[0]
maxy := yarr[0]
sort.Ints(yarr)
println(len(yarr))
for i := 1; i < len(yarr); i++ {
y := yarr[i]
if maxy+1 == y {
maxy = y
} else {
if maxy-miny > 1 {
shapes = append(shapes, chipmunk.NewSegment(
vect.Vect{vect.Float(float32(x)*m.TileSize) - centerx, -vect.Float(float32(miny)*m.TileSize) + centery},
vect.Vect{vect.Float(float32(x)*m.TileSize) - centerx, -vect.Float(float32(maxy)*m.TileSize) + centery},
1))
println(x, miny, maxy)
}
miny = y
maxy = y
}
}
if maxy-miny > 1 {
shapes = append(shapes, chipmunk.NewSegment(
vect.Vect{vect.Float(float32(x)*m.TileSize) - centerx, -vect.Float(float32(miny)*m.TileSize) + centery},
vect.Vect{vect.Float(float32(x)*m.TileSize) - centerx, -vect.Float(float32(maxy)*m.TileSize) + centery},
1))
println(x, miny, maxy)
}
}
println("Map end")
m.GameObject().AddComponent(engine.NewPhysicsShapes(true, shapes))
}
func main() {
//renderer and game engine
glRenderer := opengl.NewOpenglRenderer("Platformer", 800, 800, false)
gameEngine := engine.NewEngine(glRenderer)
gameEngine.InitFpsDial()
// physics engine (Chipmonk)
physicsSpace := chipmunkPhysics.NewChipmonkSpace()
physicsSpace.SetGravity(mgl32.Vec2{0, 400})
gameEngine.AddUpdatable(physicsSpace)
gameEngine.Start(func() {
glRenderer.BackGroundColor(0.7, 0.7, 0.9, 0.0)
// load in default shader
shader := renderer.NewShader()
shader.FragSrc = fragShader
shader.VertSrc = vertShader
gameEngine.DefaultShader(shader)
// The player object
character := NewCharacter()
character.body.SetPosition(mgl32.Vec2{400, 400})
// Add the character to all the things
physicsSpace.AddBody(character.body)
gameEngine.AddOrtho(character.sprite)
gameEngine.AddUpdatable(character)
// terrain
terrainGeometry := renderer.CreateBoxWithOffset(800, 800-floorHeight, 0, floorHeight)
terrainGeometry.SetColor(color.NRGBA{0, 80, 0, 254})
gameEngine.AddOrtho(terrainGeometry)
// terrain physics body
terrainBody := chipmunkPhysics.NewChipmunkBodyStatic()
segment := chipmunk.NewSegment(vect.Vect{0, floorHeight}, vect.Vect{4000, floorHeight}, 0)
terrainBody.Body.AddShape(segment)
physicsSpace.AddBody(terrainBody)
particleNode := renderer.NewNode()
gameEngine.AddOrtho(particleNode)
// create a new timed particle system
spawnParticles := func(load func() *effects.ParticleGroup, position mgl32.Vec2) {
particleGroup := load()
particleGroup.SetTranslation(position.Vec3(0))
effects.TriggerTimedParticleGroup(
effects.TimedParticleGroup{
Particles: particleGroup,
GameEngine: gameEngine,
TargetNode: particleNode,
Life: 0.2,
Cleanup: 10,
},
)
}
// input/controller manager
controllerManager := glfwController.NewControllerManager(glRenderer.Window)
// key bindings
customController := controller.CreateController()
controllerManager.AddController(customController.(glfwController.Controller))
// Walk
customController.BindKeyAction(func() {
character.body.SetVelocity(mgl32.Vec2{-200, character.body.GetVelocity().Y()})
}, controller.KeyA, controller.Press)
customController.BindKeyAction(func() {
character.body.SetVelocity(mgl32.Vec2{200, character.body.GetVelocity().Y()})
}, controller.KeyD, controller.Press)
//Stop walking
customController.BindKeyAction(func() {
character.body.SetVelocity(mgl32.Vec2{0, character.body.GetVelocity().Y()})
}, controller.KeyA, controller.Release)
customController.BindKeyAction(func() {
character.body.SetVelocity(mgl32.Vec2{0, character.body.GetVelocity().Y()})
}, controller.KeyD, controller.Release)
// Jump
customController.BindKeyAction(func() {
character.body.SetVelocity(character.body.GetVelocity().Add(mgl32.Vec2{0, -300}))
spawnParticles(dustParticles, character.body.GetPosition().Add(mgl32.Vec2{0, 0.5 * characterSize}))
}, controller.KeySpace, controller.Press)
// shoot
customController.BindMouseAction(func() {
spawnParticles(majicParticles, character.body.GetPosition())
}, controller.MouseButtonLeft, controller.Press)
// create sparks when player collides with somthing
var collisionTimer time.Time
physicsSpace.SetOnCollision(func(shapeA, shapeB *chipmunk.Shape) {
if time.Since(collisionTimer) > 200*time.Millisecond {
spawnParticles(sparkParticles, character.body.GetPosition().Add(mgl32.Vec2{0, 0.5 * characterSize}))
}
collisionTimer = time.Now()
})
})
}
func (self LevelPoint) getChipmunkSegment() *chipmunk.Shape {
return chipmunk.NewSegment(vect.Vect{vect.Float(self.Ax), vect.Float(self.Ay)}, vect.Vect{vect.Float(self.Bx), vect.Float(self.By)}, 0)
}