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Fix model caching.

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This commit is contained in:
IntegratedQuantum 2024-07-06 16:21:12 +02:00
parent 7e3694f1c6
commit 49596020aa
2 changed files with 14 additions and 7 deletions
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15
src/models.zig
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@ -7,6 +7,7 @@ const main = @import("main.zig");
const vec = @import("vec.zig");
const Vec3i = vec.Vec3i;
const Vec3f = vec.Vec3f;
const Vec2i = vec.Vec2i;
const Vec2f = vec.Vec2f;
const Mat4f = vec.Mat4f;
const FaceData = main.renderer.chunk_meshing.FaceData;
@ -20,6 +21,12 @@ pub const QuadInfo = extern struct {
cornerUV: [4]Vec2f,
textureSlot: u32,
};
pub const HashableQuadInfo = extern struct {
normal: Vec3i,
corners: [4]Vec3i,
cornerUV: [4]Vec2i,
textureSlot: u32,
};
const ExtraQuadInfo = struct {
faceNeighbor: ?u3,
@ -214,7 +221,7 @@ pub var models: main.List(Model) = undefined;
pub var fullCube: u16 = undefined;
pub const greedyMeshableQuads: u16 = 6;
var quadDeduplication: std.AutoHashMap([@sizeOf(QuadInfo) + 1]u8, u16) = undefined;
var quadDeduplication: std.AutoHashMap(struct{HashableQuadInfo, bool}, u16) = undefined;
fn getLineGreedyMeshingDir(corner0: Vec3f, corner1: Vec3f, corner0UV: Vec2f, corner1UV: Vec2f) ?u3 {
// One component must wrap around, while the other 2 compoenents must be equal:
@ -245,7 +252,7 @@ fn getLineGreedyMeshingDir(corner0: Vec3f, corner1: Vec3f, corner0UV: Vec2f, cor
}
fn addQuad(info: QuadInfo, offsetByNormal: bool) error{Degenerate}!u16 {
if(quadDeduplication.get(std.mem.toBytes(info) ++ .{@intFromBool(offsetByNormal)})) |id| {
if(quadDeduplication.get(.{@bitCast(info), offsetByNormal})) |id| {
return id;
}
// Check if it's degenerate:
@ -258,7 +265,7 @@ fn addQuad(info: QuadInfo, offsetByNormal: bool) error{Degenerate}!u16 {
if(cornerEqualities >= 2) return error.Degenerate; // One corner equality is fine, since then the quad degenerates to a triangle, which has a non-zero area.
const index: u16 = @intCast(quads.items.len);
quads.append(info);
quadDeduplication.put(std.mem.toBytes(info) ++ .{@intFromBool(offsetByNormal)}, index) catch unreachable;
quadDeduplication.put(.{@bitCast(info), offsetByNormal}, index) catch unreachable;
var extraQuadInfo: ExtraQuadInfo = undefined;
extraQuadInfo.faceNeighbor = Model.getFaceNeighbor(&info);
@ -372,7 +379,7 @@ pub fn init() void {
models = main.List(Model).init(main.globalAllocator);
quads = main.List(QuadInfo).init(main.globalAllocator);
extraQuadInfos = main.List(ExtraQuadInfo).init(main.globalAllocator);
quadDeduplication = std.AutoHashMap([@sizeOf(QuadInfo) + 1]u8, u16).init(main.globalAllocator.allocator);
quadDeduplication = @TypeOf(quadDeduplication).init(main.globalAllocator.allocator);
nameToIndex = std.StringHashMap(u16).init(main.globalAllocator.allocator);

6
src/renderer/chunk_meshing.zig
View File

@ -473,11 +473,11 @@ const PrimitiveMesh = struct {
for(0..2) |y| {
const quadIndex = face.blockAndQuad.quadIndex;
var vertexPos = models.quads.items[quadIndex].corners[0];
vertexPos += (models.quads.items[quadIndex].corners[2] - models.quads.items[quadIndex].corners[0])*@as(Vec3f, @splat(@floatFromInt(x*(face.position.xSizeMinusOne + 1))));
vertexPos += (models.quads.items[quadIndex].corners[2] - models.quads.items[quadIndex].corners[0])*@as(Vec3f, @splat(@floatFromInt(x*(xLightSize - 1))));
if(x != 0) {
vertexPos += (models.quads.items[quadIndex].corners[3] - models.quads.items[quadIndex].corners[2])*@as(Vec3f, @splat(@floatFromInt(y*(face.position.ySizeMinusOne + 1))));
vertexPos += (models.quads.items[quadIndex].corners[3] - models.quads.items[quadIndex].corners[2])*@as(Vec3f, @splat(@floatFromInt(y*(yLightSize - 1))));
} else {
vertexPos += (models.quads.items[quadIndex].corners[1] - models.quads.items[quadIndex].corners[0])*@as(Vec3f, @splat(@floatFromInt(y*(face.position.ySizeMinusOne + 1))));
vertexPos += (models.quads.items[quadIndex].corners[1] - models.quads.items[quadIndex].corners[0])*@as(Vec3f, @splat(@floatFromInt(y*(yLightSize - 1))));
}
self.min = @min(self.min, basePos + vertexPos);
self.max = @max(self.max, basePos + vertexPos);