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87 lines
2.0 KiB
Go
Executable File
87 lines
2.0 KiB
Go
Executable File
package rend3dgl
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import (
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"github.com/bloeys/gglm/gglm"
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"github.com/bloeys/nmage/buffers"
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"github.com/bloeys/nmage/materials"
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"github.com/bloeys/nmage/meshes"
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"github.com/bloeys/nmage/renderer"
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"github.com/go-gl/gl/v4.1-core/gl"
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)
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var _ renderer.Render = &Rend3DGL{}
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type Rend3DGL struct {
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BoundVaoId uint32
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BoundMatId uint32
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BoundMeshVaoId uint32
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}
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func (r *Rend3DGL) DrawMesh(mesh *meshes.Mesh, modelMat *gglm.TrMat, mat *materials.Material) {
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if mesh.Vao.Id != r.BoundMeshVaoId {
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mesh.Vao.Bind()
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r.BoundMeshVaoId = mesh.Vao.Id
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}
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if mat.Id != r.BoundMatId {
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mat.Bind()
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r.BoundMatId = mat.Id
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}
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if mat.Settings.Has(materials.MaterialSettings_HasModelMtx) {
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mat.SetUnifMat4("modelMat", &modelMat.Mat4)
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}
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if mat.Settings.Has(materials.MaterialSettings_HasNormalMtx) {
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normalMat := modelMat.Clone().InvertAndTranspose().ToMat3()
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mat.SetUnifMat3("normalMat", &normalMat)
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}
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for i := 0; i < len(mesh.SubMeshes); i++ {
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gl.DrawElementsBaseVertexWithOffset(gl.TRIANGLES, mesh.SubMeshes[i].IndexCount, gl.UNSIGNED_INT, uintptr(mesh.SubMeshes[i].BaseIndex), mesh.SubMeshes[i].BaseVertex)
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}
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}
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func (r *Rend3DGL) DrawVertexArray(mat *materials.Material, vao *buffers.VertexArray, firstElement int32, elementCount int32) {
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if vao.Id != r.BoundVaoId {
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vao.Bind()
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r.BoundVaoId = vao.Id
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}
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if mat.Id != r.BoundMatId {
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mat.Bind()
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r.BoundMatId = mat.Id
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}
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gl.DrawArrays(gl.TRIANGLES, firstElement, elementCount)
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}
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func (r *Rend3DGL) DrawCubemap(mesh *meshes.Mesh, mat *materials.Material) {
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if mesh.Vao.Id != r.BoundMeshVaoId {
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mesh.Vao.Bind()
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r.BoundMeshVaoId = mesh.Vao.Id
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}
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if mat.Id != r.BoundMatId {
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mat.Bind()
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r.BoundMatId = mat.Id
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}
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for i := 0; i < len(mesh.SubMeshes); i++ {
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gl.DrawElementsBaseVertexWithOffset(gl.TRIANGLES, mesh.SubMeshes[i].IndexCount, gl.UNSIGNED_INT, uintptr(mesh.SubMeshes[i].BaseIndex), mesh.SubMeshes[i].BaseVertex)
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}
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}
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func (r3d *Rend3DGL) FrameEnd() {
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r3d.BoundVaoId = 0
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r3d.BoundMatId = 0
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r3d.BoundMeshVaoId = 0
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}
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func NewRend3DGL() *Rend3DGL {
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return &Rend3DGL{}
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}
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