func NewFloor(shader loader.Shader, reflected ...Drawable) Drawable {
glctx := shader.Context()
floor := NewStaticShape(glctx)
floor.vertices = floorVertices
floor.normals = floorNormals
floor.Buffer()
flipped := mgl.Scale3D(1, -1, 1)
return &Floor{
Node: Node{
Shape: floor,
transform: &flipped,
shader: shader,
},
reflected: reflected,
}
}
func NewSkybox(shader loader.Shader, texture gl.Texture) Drawable {
glctx := shader.Context()
skyboxShape := NewStaticShape(glctx)
skyboxShape.vertices = skyboxVertices
skyboxShape.indices = skyboxIndices
skyboxShape.Buffer()
skyboxShape.Texture = texture
skybox := &Skybox{
Node: Node{
Shape: skyboxShape,
shader: shader,
},
}
return skybox
}
func (ctx *FrameContext) DrawContext(shader loader.Shader) DrawContext {
r := DrawContext{
GL: ctx.GL,
Camera: ctx.Camera,
Shader: shader,
}
if ctx.activeShader != shader {
shader.Use()
ctx.activeShader = shader
}
if ctx.shaderCache == nil {
ctx.shaderCache = map[loader.Shader]struct{}{shader: struct{}{}}
ctx.bindShader(shader)
} else if _, ok := ctx.shaderCache[shader]; !ok {
ctx.bindShader(shader)
}
return r
}
func (ctx *FrameContext) bindShader(shader loader.Shader) {
cam, glctx := ctx.Camera, ctx.GL
projection, view, position := cam.Projection(), cam.View(), cam.Position()
glctx.UniformMatrix4fv(shader.Uniform("cameraPos"), position[:])
glctx.UniformMatrix4fv(shader.Uniform("view"), view[:])
glctx.UniformMatrix4fv(shader.Uniform("projection"), projection[:])
}