eirys / ft_vox

A procedural voxel terrain rendering engine in C++ and Vulkan

ft_vox

A voxel rendering engine in C++ and Vulkan

The main challenge is to have nice performances in rendering fluidity.

ft_vox's Issues

Infinite terrain

https://www.omardelarosa.com/posts/2020/01/06/infinity-terrain-in-c++-using-perlin-noise-and-opengl

Try to transplant HLSL shaders for testing purposes

View frustum culling

https://iquilezles.org/articles/frustum/
https://iquilezles.org/articles/frustumcorrect/

Fix pos building

CPP code

inline int32_t	toChunkPos(float x, float y, float z) noexcept {
	// TODO: Add render distance in ubo
	int32_t chunk_address =
		(int32_t)x / CHUNK_SIZE |
		((int32_t)z / CHUNK_SIZE) << 8 |
		((int32_t)y / CHUNK_SIZE) << 16;

	x = (int32_t)x % CHUNK_SIZE;
	y = (int32_t)y % CHUNK_SIZE;
	z = (int32_t)z % CHUNK_SIZE;

	return
		static_cast<int32_t>(x) |
		static_cast<int32_t>(y) << 4 |
		static_cast<int32_t>(z) << 8 |
		chunk_address << 12;
}

HLSL code

// Extract actual vertex position from input
float4	extractPos(int input) {
	// Local position in chunk
	float3	pos = float3(
		input & 0xF,
		(input >> 4) & 0xF,
		(input >> 8) & 0xF);
	
	// Chunk position in world
	int chunk_x = (input >> 12) & 0xFF;
	int chunk_z = (input >> 20) & 0xFF;
	int chunk_y = (input >> 28) & 0xF;
	
	return float4(
		(chunk_x * 16) + pos.x,
		(chunk_y * 16) + pos.y,
		(chunk_z * 16) + pos.z,
		1.0
	);
}

TRY INSTANCING!!

Change `cursor++` to `++cursor`

Actually, it's a Windows feature:
Every line feed (\LF) on Linux are actually interpreted as carriage-return/line-feed (\CRLF).
The "fix" is in the readExcept lambda function:

ParseNumberFn	readExcept = [this]() -> uint8_t {
	if (cursor >= base::data.size()) {
		throw PpmParseError("unexpected end of file");
	}
	// replace `cursor++` to `++cursor`:
	return base::data[++cursor];
};

Cache data

https://medium.com/@saeid.gholizade/voxy-tool-development-so-far-ec41611ca9e

adapt main to prompt for generation seed

need to add constructor for App(uint32_t seed) or sth

Bake chunk map via computes

Create wrapper classes

• command buffer
• buffer
• images
• [ ]

Add shadow mapping!

https://learnopengl.com/Advanced-OpenGL/Stencil-testing

Properly setup the engine

Upgrade command buffer thing,
Textures setup,
...

Greedy meshing

https://devforum.roblox.com/t/consume-everything-how-greedy-meshing-works/452717

Compute occlusion & frustum culling

• Occ culling
• Frustum culling

blocks specialization

Add projective texturing

cf https://developer.download.nvidia.com/CgTutorial/cg_tutorial_chapter09.html

Fix function comment

In matrix.cpp, comment is "Produces orthographic projection matrix" l.422.
Replace with "Produces perspective projection matrix".

check if shaders can be updated (to retrieve pos, normal, uv etc.)

https://www.khronos.org/opengl/wiki/Atomic_Counter

FIX PPM PARSER

• #12
• Change readfile

Add fog

https://developer.download.nvidia.com/CgTutorial/cg_tutorial_chapter09.html

biome generation