func fire() {
const cubesToMake = 4
var offset float32 = 0.0
if len(cubes) > 0 && (len(cubes)/cubesToMake)%2 >= 1 {
offset = 0.75
}
for i := 0; i < cubesToMake; i++ {
e := new(Entity)
e.Node = CreateCube(-0.5, -0.5, -0.5, 0.5, 0.5, 0.5)
e.Node.Shader = diffuseShader
e.Node.Color = mgl.Vec4{1.0, 1.0, 1.0, 1.0}
e.Node.Location = mgl.Vec3{float32(i*2.0-cubesToMake/2) - 0.5 + offset, 10.0, 0.0}
e.Node.Tex0 = crateTexture
// create the collision box for the the cube
cubeCollider := cubez.NewCollisionCube(nil, m.Vector3{0.5, 0.5, 0.5})
cubeCollider.Body.Position = m.Vector3{m.Real(i*2.0-cubesToMake/2) - 0.5 + m.Real(offset), 10.0, 0.0}
cubeCollider.Body.SetMass(8.0)
cubeCollider.Body.CanSleep = true
var cubeInertia m.Matrix3
cubeInertia.SetBlockInertiaTensor(&cubeCollider.HalfSize, 8.0)
cubeCollider.Body.SetInertiaTensor(&cubeInertia)
cubeCollider.Body.CalculateDerivedData()
cubeCollider.CalculateDerivedData()
e.Collider = cubeCollider
cubes = append(cubes, e)
}
}
func main() {
app = NewApp()
app.InitGraphics("Ballistic", 800, 600)
app.SetKeyCallback(keyCallback)
app.OnRender = renderCallback
app.OnUpdate = updateCallback
defer app.Terminate()
// compile the shaders
var err error
colorShader, err = LoadShaderProgram(DiffuseColorVertShader, DiffuseColorFragShader)
if err != nil {
panic("Failed to compile the shader! " + err.Error())
}
// create the ground plane
groundPlane = cubez.NewCollisionPlane(m.Vector3{0.0, 1.0, 0.0}, 0.0)
// make a ground plane to draw
ground = CreatePlaneXZ(-500.0, 500.0, 500.0, -500.0, 1.0)
ground.Shader = colorShader
ground.Color = mgl.Vec4{0.6, 0.6, 0.6, 1.0}
// create a test cube to render
cubeNode := CreateCube(-1.0, -1.0, -1.0, 1.0, 1.0, 1.0)
cubeNode.Shader = colorShader
cubeNode.Color = mgl.Vec4{1.0, 0.0, 0.0, 1.0}
// create the collision box for the the cube
var cubeMass m.Real = 8.0
var cubeInertia m.Matrix3
cubeCollider := cubez.NewCollisionCube(nil, m.Vector3{1.0, 1.0, 1.0})
cubeCollider.Body.Position = m.Vector3{0.0, 5.0, 0.0}
cubeCollider.Body.SetMass(cubeMass)
cubeInertia.SetBlockInertiaTensor(&cubeCollider.HalfSize, cubeMass)
cubeCollider.Body.SetInertiaTensor(&cubeInertia)
cubeCollider.Body.CalculateDerivedData()
cubeCollider.CalculateDerivedData()
// make the entity out of the renerable and collider
cube = NewEntity(cubeNode, cubeCollider)
// make a slice of entities for bullets
bullets = make([]*Entity, 0, 16)
// make the backboard to bound the bullets off of
backboardNode := CreateCube(-0.5, -2.0, -0.25, 0.5, 2.0, 0.25)
backboardNode.Shader = colorShader
backboardNode.Color = mgl.Vec4{0.25, 0.2, 0.2, 1.0}
backboardCollider := cubez.NewCollisionCube(nil, m.Vector3{0.5, 2.0, 0.25})
backboardCollider.Body.Position = m.Vector3{0.0, 2.0, -10.0}
backboardCollider.Body.SetInfiniteMass()
backboardCollider.Body.CalculateDerivedData()
backboardCollider.CalculateDerivedData()
SetGlVector3(&backboardNode.Location, &backboardCollider.Body.Position)
// make the backboard entity
backboard = NewEntity(backboardNode, backboardCollider)
// setup the camera
app.CameraPos = mgl.Vec3{-3.0, 3.0, 15.0}
app.CameraRotation = mgl.QuatLookAtV(
mgl.Vec3{-3.0, 3.0, 15.0},
mgl.Vec3{0.0, 1.0, 0.0},
mgl.Vec3{0.0, 1.0, 0.0})
gl.Enable(gl.DEPTH_TEST)
app.RenderLoop()
}