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Add render block #2946

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dce9d62
add getLightWithTransform for block entities
OneAvargeCoder193 Apr 19, 2026
3c0a354
add renderBlock
OneAvargeCoder193 Apr 19, 2026
184b78e
move block item texture rendering to renderBlock
OneAvargeCoder193 Apr 19, 2026
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77 changes: 10 additions & 67 deletions src/graphics.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -2649,73 +2649,16 @@ pub fn generateBlockTexture(blockType: u16) Texture {
const oldViewMatrix = main.game.camera.viewMatrix;
main.game.camera.viewMatrix = Mat4f.identity().mul(Mat4f.rotationX(std.math.pi/4.0)).mul(Mat4f.rotationZ(1.0*std.math.pi/4.0));
defer main.game.camera.viewMatrix = oldViewMatrix;
const uniforms = if (block.transparent()) &main.renderer.chunk_meshing.transparentUniforms else &main.renderer.chunk_meshing.uniforms;

var faceData: main.ListUnmanaged(main.renderer.chunk_meshing.FaceData) = .{};
defer faceData.deinit(main.stackAllocator);
const model = main.blocks.meshes.model(block).model();
const pos: main.chunk.BlockPos = .fromCoords(1, 1, 1);
if (block.hasBackFace()) {
model.appendInternalQuadsToList(&faceData, main.stackAllocator, block, pos, true);
for (main.chunk.Neighbor.iterable) |neighbor| {
model.appendNeighborFacingQuadsToList(&faceData, main.stackAllocator, block, neighbor, pos, true);
}
}
model.appendInternalQuadsToList(&faceData, main.stackAllocator, block, pos, false);
for (main.chunk.Neighbor.iterable) |neighbor| {
model.appendNeighborFacingQuadsToList(&faceData, main.stackAllocator, block, neighbor, pos.neighbor(neighbor)[0], false);
}

for (faceData.items) |*face| {
face.position.lightIndex = 0;
}
var allocation: SubAllocation = .{.start = 0, .len = 0};
main.renderer.chunk_meshing.faceBuffers[0].uploadData(faceData.items, &allocation);
defer main.renderer.chunk_meshing.faceBuffers[0].free(allocation);
var lightAllocation: SubAllocation = .{.start = 0, .len = 0};
main.renderer.chunk_meshing.lightBuffers[0].uploadData(&.{0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff}, &lightAllocation);
defer main.renderer.chunk_meshing.lightBuffers[0].free(lightAllocation);

{
const i = 4; // Easily switch between the 8 diagonal coordinates.
var x: f64 = -65.5 + 1.5;
var y: f64 = -65.5 + 1.5;
var z: f64 = -92.631 + 1.5;
if (i & 1 != 0) x = -x + 3;
if (i & 2 != 0) y = -y + 3;
if (i & 4 != 0) z = -z + 3;
var chunkAllocation: SubAllocation = .{.start = 0, .len = 0};
main.renderer.chunk_meshing.chunkBuffer.uploadData(&.{.{
.position = .{0, 0, 0},
.min = undefined,
.max = undefined,
.voxelSize = 1,
.lightStart = lightAllocation.start,
.vertexStartOpaque = undefined,
.faceCountsByNormalOpaque = undefined,
.vertexStartTransparent = undefined,
.vertexCountTransparent = undefined,
.visibilityState = 0,
.oldVisibilityState = 0,
}}, &chunkAllocation);
defer main.renderer.chunk_meshing.chunkBuffer.free(chunkAllocation);
if (block.transparent()) {
c.glBlendEquation(c.GL_FUNC_ADD);
c.glBlendFunc(c.GL_ONE, c.GL_SRC1_COLOR);
main.renderer.chunk_meshing.bindTransparentShaderAndUniforms(projMatrix, .{1, 1, 1}, .{x, y, z});
} else {
main.renderer.chunk_meshing.bindShaderAndUniforms(projMatrix, .{1, 1, 1}, .{x, y, z});
}
c.glUniform1f(uniforms.contrast, 0.25);
c.glActiveTexture(c.GL_TEXTURE0);
main.blocks.meshes.blockTextureArray.bind();
c.glActiveTexture(c.GL_TEXTURE1);
main.blocks.meshes.emissionTextureArray.bind();
c.glActiveTexture(c.GL_TEXTURE2);
main.blocks.meshes.reflectivityAndAbsorptionTextureArray.bind();
block_texture.depthTexture.bindTo(5);
c.glDrawElementsInstancedBaseVertexBaseInstance(c.GL_TRIANGLES, @intCast(6*faceData.items.len), c.GL_UNSIGNED_INT, null, 1, allocation.start*4, chunkAllocation.start);
}

const i = 4; // Easily switch between the 8 diagonal coordinates.
var x: f64 = -65.5 + 0.5;
var y: f64 = -65.5 + 0.5;
var z: f64 = -92.631 + 0.5;
if (i & 1 != 0) x = -x + 1;
if (i & 2 != 0) y = -y + 1;
if (i & 4 != 0) z = -z + 1;

main.renderer.renderBlock(projMatrix, Mat4f.identity(), block, .{.uniform = 0xffffffff}, .{1, 1, 1}, .{x, y, z}, .transparent, 0.25);

c.glDisable(c.GL_CULL_FACE);
var finalFrameBuffer: FrameBuffer = undefined;
Expand Down
166 changes: 166 additions & 0 deletions src/renderer.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,30 @@ var fakeReflectionUniforms: struct {
frequency: c_int,
reflectionMapSize: c_int,
} = undefined;
const BlockUniforms = struct {
projectionMatrix: c_int,
viewMatrix: c_int,
modelMatrix: c_int,
playerPositionInteger: c_int,
playerPositionFraction: c_int,
screenSize: c_int,
ambientLight: c_int,
contrast: c_int,
@"fog.color": c_int,
@"fog.density": c_int,
@"fog.fogLower": c_int,
@"fog.fogHigher": c_int,
reflectionMapSize: c_int,
lodDistance: c_int,
zNear: c_int,
zFar: c_int,
};

var blockUniforms: BlockUniforms = undefined;
var blockTransparentUniforms: BlockUniforms = undefined;

var blockPipeline: graphics.Pipeline = undefined;
var blockTransparentPipeline: graphics.Pipeline = undefined;

pub var activeFrameBuffer: c_uint = 0;

Expand All @@ -79,6 +103,31 @@ pub fn init() void {
.{.depthTest = false, .depthWrite = false},
.{.attachments = &.{.noBlending}},
);
blockPipeline = graphics.Pipeline.init(
"assets/cubyz/shaders/chunks/chunk_vertex.vert",
"assets/cubyz/shaders/chunks/chunk_fragment.frag",
"#define ENTITY",
&blockUniforms,
.{},
.{.depthTest = true, .depthWrite = true},
.{.attachments = &.{.noBlending}},
);
blockTransparentPipeline = graphics.Pipeline.init(
"assets/cubyz/shaders/chunks/chunk_vertex.vert",
"assets/cubyz/shaders/chunks/transparent_fragment.frag",
"#define ENTITY\n#define transparent\n",
&blockTransparentUniforms,
.{},
.{.depthTest = true, .depthWrite = false, .depthCompare = .lessOrEqual},
.{.attachments = &.{.{
.srcColorBlendFactor = .one,
.dstColorBlendFactor = .src1Color,
.colorBlendOp = .add,
.srcAlphaBlendFactor = .one,
.dstAlphaBlendFactor = .src1Alpha,
.alphaBlendOp = .add,
}}},
);
worldFrameBuffer.init(true, c.GL_NEAREST, c.GL_CLAMP_TO_EDGE);
worldFrameBuffer.updateSize(Window.width, Window.height, c.GL_RGB16F);
Bloom.init();
Expand All @@ -95,6 +144,8 @@ pub fn init() void {
pub fn deinit() void {
deferredRenderPassPipeline.deinit();
fakeReflectionPipeline.deinit();
blockPipeline.deinit();
blockTransparentPipeline.deinit();
worldFrameBuffer.deinit();
Bloom.deinit();
MeshSelection.deinit();
Expand Down Expand Up @@ -327,6 +378,121 @@ pub fn renderWorld(world: *World, ambientLight: Vec3f, skyColor: Vec3f, playerPo
gpu_performance_measuring.stopQuery();
}

pub fn renderBlock(projMatrix: Mat4f, modelMatrix: Mat4f, block: blocks.Block, lighting: union(enum) {
world: Vec3i,
uniform: u32,
}, ambientLight: Vec3f, playerPosition: Vec3d, transparencyMode: enum {
@"opaque",
transparent,
}, contrast: f32) void {
var faceData: main.ListUnmanaged(chunk_meshing.FaceData) = .{};
defer faceData.deinit(main.stackAllocator);
const model = main.blocks.meshes.model(block).model();
if (block.hasBackFace()) {
model.appendInternalQuadsToList(&faceData, main.stackAllocator, block, .fromCoords(1, 1, 1), true);
for (main.chunk.Neighbor.iterable) |neighbor| {
model.appendNeighborFacingQuadsToList(&faceData, main.stackAllocator, block, neighbor, .fromCoords(1, 1, 1), true);
}
}
model.appendInternalQuadsToList(&faceData, main.stackAllocator, block, .fromCoords(1, 1, 1), false);
for (main.chunk.Neighbor.iterable) |neighbor| {
model.appendNeighborFacingQuadsToList(&faceData, main.stackAllocator, block, neighbor, main.chunk.BlockPos.fromCoords(1, 1, 1).neighbor(neighbor)[0], false);
}
for (faceData.items, 0..) |*face, i| {
face.position.lightIndex = @intCast(i);
}

const lightData = main.stackAllocator.alloc(u32, faceData.items.len*4);
defer main.stackAllocator.free(lightData);

switch (lighting) {
.world => |lightPos| {
const mesh = mesh_storage.getMesh(main.chunk.ChunkPosition.initFromWorldPos(lightPos, 1)) orelse return;
for (faceData.items) |face| {
const quad = face.blockAndQuad.quadIndex.quadInfo();
const light: [4]u32 = chunk_meshing.PrimitiveMesh.getLightWithTransform(mesh, modelMatrix, -Vec3i{mesh.pos.wx, mesh.pos.wy, mesh.pos.wz}, blocks.meshes.textureIndex(block, quad.textureSlot), face.blockAndQuad.quadIndex);
lightData[face.position.lightIndex*4 ..][0..4].* = light;
}
},
.uniform => |light| {
@memset(lightData, light);
},
}

const transparent = block.transparent() and transparencyMode == .transparent;

renderFaces(projMatrix, modelMatrix, faceData.items, lightData, ambientLight, playerPosition, transparent, contrast);
}

fn renderFaces(projMatrix: Mat4f, modelMatrix: Mat4f, faceData: []chunk_meshing.FaceData, lightData: []u32, ambientLight: Vec3f, playerPosition: Vec3d, transparent: bool, contrast: f32) void {
var allocation: graphics.SubAllocation = .{.start = 0, .len = 0};
main.renderer.chunk_meshing.faceBuffers[0].uploadData(faceData, &allocation);
defer main.renderer.chunk_meshing.faceBuffers[0].free(allocation);
var lightAllocation: graphics.SubAllocation = .{.start = 0, .len = 0};
main.renderer.chunk_meshing.lightBuffers[0].uploadData(lightData, &lightAllocation);
defer main.renderer.chunk_meshing.lightBuffers[0].free(lightAllocation);

var chunkAllocation: graphics.SubAllocation = .{.start = 0, .len = 0};
main.renderer.chunk_meshing.chunkBuffer.uploadData(&.{.{
.position = .{0, 0, 0},
.min = undefined,
.max = undefined,
.voxelSize = 1,
.lightStart = lightAllocation.start,
.vertexStartOpaque = undefined,
.faceCountsByNormalOpaque = undefined,
.vertexStartTransparent = undefined,
.vertexCountTransparent = undefined,
.visibilityState = 0,
.oldVisibilityState = 0,
}}, &chunkAllocation);
defer main.renderer.chunk_meshing.chunkBuffer.free(chunkAllocation);

const uniforms = if (transparent) blockTransparentUniforms else blockUniforms;
if (transparent) {
blockTransparentPipeline.bind(null);

c.glUniform3fv(uniforms.@"fog.color", 1, @ptrCast(&game.fog.skyColor));
c.glUniform1f(uniforms.@"fog.density", game.fog.density);
c.glUniform1f(uniforms.@"fog.fogLower", game.fog.fogLower);
c.glUniform1f(uniforms.@"fog.fogHigher", game.fog.fogHigher);
} else {
blockPipeline.bind(null);
}

c.glUniformMatrix4fv(uniforms.projectionMatrix, 1, c.GL_TRUE, @ptrCast(&projMatrix));

c.glUniform1f(uniforms.reflectionMapSize, main.renderer.reflectionCubeMapSize);

c.glUniform1f(uniforms.contrast, contrast);

c.glUniform1f(uniforms.lodDistance, main.settings.@"lod0.5Distance");

c.glUniformMatrix4fv(uniforms.viewMatrix, 1, c.GL_TRUE, @ptrCast(&main.game.camera.viewMatrix));

c.glUniform3f(uniforms.ambientLight, ambientLight[0], ambientLight[1], ambientLight[2]);

c.glUniform1f(uniforms.zNear, main.renderer.zNear);
c.glUniform1f(uniforms.zFar, main.renderer.zFar);

const playerPos = playerPosition + Vec3d{1, 1, 1};
c.glUniform3i(uniforms.playerPositionInteger, @intFromFloat(@floor(playerPos[0])), @intFromFloat(@floor(playerPos[1])), @intFromFloat(@floor(playerPos[2])));
c.glUniform3f(uniforms.playerPositionFraction, @floatCast(@mod(playerPos[0], 1)), @floatCast(@mod(playerPos[1], 1)), @floatCast(@mod(playerPos[2], 1)));
c.glUniformMatrix4fv(uniforms.modelMatrix, 1, c.GL_TRUE, @ptrCast(&modelMatrix));

main.renderer.chunk_meshing.vao.bind();

main.renderer.chunk_meshing.faceBuffers[0].ssbo.bind(main.renderer.chunk_meshing.faceBuffers[0].binding);
main.renderer.chunk_meshing.lightBuffers[0].ssbo.bind(main.renderer.chunk_meshing.lightBuffers[0].binding);
c.glActiveTexture(c.GL_TEXTURE0);
main.blocks.meshes.blockTextureArray.bind();
c.glActiveTexture(c.GL_TEXTURE1);
main.blocks.meshes.emissionTextureArray.bind();
c.glActiveTexture(c.GL_TEXTURE2);
main.blocks.meshes.reflectivityAndAbsorptionTextureArray.bind();
c.glDrawElementsInstancedBaseVertexBaseInstance(c.GL_TRIANGLES, @intCast(6*faceData.len), c.GL_UNSIGNED_INT, null, 1, allocation.start*4, chunkAllocation.start);
}

const Bloom = struct { // MARK: Bloom
var buffer1: graphics.FrameBuffer = undefined;
var buffer2: graphics.FrameBuffer = undefined;
Expand Down
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