Struct three_d::object::InstancedMesh

pub struct InstancedMesh {
    pub cull: CullType,
    pub transformation: Mat4,
    // some fields omitted
}

Similar to Mesh, except it is possible to render many instances of the same triangle mesh efficiently.

Fields

cull: CullType

transformation: Mat4

Implementations

impl InstancedMesh

pub fn new(
    context: &Context,
    transformations: &[Mat4],
    cpu_mesh: &CPUMesh
) -> Result<Self, Error>

Constructs a new InstancedMesh from the given CPUMesh. The mesh is rendered in as many instances as there are transformation matrices in the transformations parameter. Each instance is transformed with the given transformation before it is rendered. The transformations can be updated by the update_transformations function.

pub fn render_color(
    &self,
    render_states: RenderStates,
    viewport: Viewport,
    camera: &Camera
) -> Result<(), Error>

Render the instanced mesh with a color per triangle vertex. The colors are defined when constructing the instanced mesh. Must be called in a render target render function, for example in the callback function of Screen::write. The transformation can be used to position, orientate and scale the instanced mesh.

Errors

Will return an error if the instanced mesh has no colors.

pub fn render_with_color(
    &self,
    color: &Vec4,
    render_states: RenderStates,
    viewport: Viewport,
    camera: &Camera
) -> Result<(), Error>

Render the instanced mesh with the given color. Must be called in a render target render function, for example in the callback function of Screen::write. The transformation can be used to position, orientate and scale the instanced mesh.

pub fn render_with_texture(
    &self,
    texture: &impl Texture,
    render_states: RenderStates,
    viewport: Viewport,
    camera: &Camera
) -> Result<(), Error>

Render the instanced mesh with the given texture. Must be called in a render target render function, for example in the callback function of Screen::write. The transformation can be used to position, orientate and scale the instanced mesh.

Errors

Will return an error if the instanced mesh has no uv coordinates.

pub fn render(
    &self,
    program: &InstancedMeshProgram,
    render_states: RenderStates,
    viewport: Viewport,
    camera: &Camera
) -> Result<(), Error>

Render the instanced mesh with the given InstancedMeshProgram. Must be called in a render target render function, for example in the callback function of Screen::write. The transformation can be used to position, orientate and scale the instanced mesh.

Errors

Will return an error if the instanced mesh shader program requires a certain attribute and the instanced mesh does not have that attribute. For example if the program needs the normal to calculate lighting, but the mesh does not have per vertex normals, this function will return an error.

pub fn update_transformations(&mut self, transformations: &[Mat4])

Updates the transformations applied to each mesh instance before they are rendered. The mesh is rendered in as many instances as there are transformation matrices.

Trait Implementations

impl Drop for InstancedMesh

fn drop(&mut self)

Executes the destructor for this type.

impl Geometry for InstancedMesh

fn render_depth_to_red(
    &self,
    render_states: RenderStates,
    viewport: Viewport,
    camera: &Camera,
    max_depth: f32
) -> Result<(), Error>

Render the depth (scaled such that a value of 1 corresponds to max_depth) into the red channel of the current color render target which for example is used for picking. Must be called in a render target render function, for example in the callback function of Screen::write.

fn render_depth(
    &self,
    render_states: RenderStates,
    viewport: Viewport,
    camera: &Camera
) -> Result<(), Error>

Render only the depth into the current depth render target which is useful for shadow maps or depth pre-pass. Must be called in a render target render function, for example in the callback function of Screen::write.

fn aabb(&self) -> Option<AxisAlignedBoundingBox>