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d16fade497
| Author | SHA1 | Date |
|---|---|---|
Riyyi
|
d16fade497 | 4 months ago |
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Riyyi
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b8e4d9ef3f | 4 months ago |
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Riyyi
|
03e8210165 | 4 months ago |
|
Riyyi
|
dcf2a85208 | 4 months ago |
|
Riyyi
|
b2ed951b1e | 4 months ago |
|
Riyyi
|
d63dfe2f9f | 4 months ago |
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Riyyi
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faacdca424 | 4 months ago |
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Riyyi
|
b5f3cae5ba | 4 months ago |
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Riyyi
|
1d5f5a1ad8 | 4 months ago |
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Riyyi
|
3cd2fab637 | 4 months ago |
46 changed files with 1262 additions and 259 deletions
@ -0,0 +1,19 @@
|
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#version 450 core |
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|
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layout(location = 0) in vec3 a_position; |
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layout(location = 1) in vec4 a_color; |
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layout(location = 2) in vec2 a_textureCoordinates; |
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layout(location = 3) in uint a_textureIndex; |
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|
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out vec4 v_color; |
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out vec2 v_textureCoordinates; |
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out flat uint v_textureIndex; |
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|
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void main() |
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{ |
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v_color = a_color; |
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v_textureCoordinates = a_textureCoordinates; |
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v_textureIndex = a_textureIndex; |
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// Vclip = Model transform * Vlocal |
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gl_Position = vec4(a_position, 1.0f); |
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} |
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@ -0,0 +1,14 @@
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#version 450 core |
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layout(location = 0) out vec4 color; |
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in vec4 v_color; |
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in vec3 v_textureCoordinates; |
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in flat uint v_textureIndex; |
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uniform samplerCube u_textures[32]; |
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|
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void main() |
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{ |
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color = v_color; |
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} |
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@ -0,0 +1,78 @@
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#version 450 core |
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layout(location = 0) out vec4 color; |
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in vec4 v_color; |
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in vec2 v_textureCoordinates; |
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in flat uint v_textureIndex; |
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uniform sampler2D u_textures[32]; |
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|
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// ----------------------------------------- |
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layout(std140, binding = 0) uniform Camera { |
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mat4 u_projectionView; |
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vec3 u_position; |
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}; |
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|
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// ----------------------------------------- |
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struct DirectionalLight { |
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vec3 direction; |
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vec3 ambient; |
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vec3 diffuse; |
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vec3 specular; |
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}; |
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|
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const int MAX_DIRECTIONAL_LIGHTS = 32; |
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layout(std140, binding = 1) uniform DirectionalLights { |
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DirectionalLight u_directionalLight[MAX_DIRECTIONAL_LIGHTS]; |
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}; |
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|
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// ----------------------------------------- |
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void main() |
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{ |
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float isObject = texture(u_textures[v_textureIndex + 1], v_textureCoordinates).a; |
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if (isObject == 0.0f) { |
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color = vec4(0,0,0,0); |
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return; |
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} |
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|
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vec3 albedo = texture(u_textures[v_textureIndex + 0], v_textureCoordinates).rgb; |
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float specular = texture(u_textures[v_textureIndex + 0], v_textureCoordinates).a; |
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vec3 position = texture(u_textures[v_textureIndex + 1], v_textureCoordinates).rgb; |
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vec3 normal = texture(u_textures[v_textureIndex + 2], v_textureCoordinates).rgb; |
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|
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vec3 lighting = vec3(0.0f, 0.0f, 0.0f);//albedo * v_color.xyz; |
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vec3 viewDirection = normalize(u_position - position); |
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// Loop through all directional lights |
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for (int i = 0; i < MAX_DIRECTIONAL_LIGHTS; ++i) { |
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// Diffuse |
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vec3 lightDirection = normalize(-u_directionalLight[i].direction); |
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float diffuse = max(dot(normal, lightDirection), 0.0f); |
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// Specular |
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vec3 reflectionDirection = reflect(-lightDirection, normal); |
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float specular = pow(max(dot(viewDirection, reflectionDirection), 0.0f), 32); |
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lighting += |
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(albedo * u_directionalLight[i].ambient) + |
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(albedo * diffuse * u_directionalLight[i].diffuse) + |
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(specular * u_directionalLight[i].specular); |
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} |
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|
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// Loop through all point lights |
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// TODO |
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// vec3 lightDirection = normalize(lightPosition - position); |
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// float diffuse = max(dot(normal, lightDirection), 0.0f); |
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// lighting += diffuse * albedo * u_lightColor; |
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// Loop through all spot lights |
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// TODO |
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color = vec4(lighting, 1.0f); |
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} |
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@ -0,0 +1,25 @@
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#version 450 core |
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layout(location = 0) in vec3 a_position; |
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layout(location = 1) in vec4 a_color; |
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layout(location = 2) in vec2 a_textureCoordinates; |
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layout(location = 3) in uint a_textureIndex; |
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|
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out vec4 v_color; |
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out vec2 v_textureCoordinates; |
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out flat uint v_textureIndex; |
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layout(std140, binding = 0) uniform Camera |
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{ |
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mat4 u_projectionView; |
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vec3 u_position; |
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}; |
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void main() |
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{ |
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v_color = a_color; |
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v_textureCoordinates = a_textureCoordinates; |
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v_textureIndex = a_textureIndex; |
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// Vclip = Model transform * Vlocal |
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gl_Position = vec4(a_position, 1.0f); |
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} |
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Binary file not shown.
@ -0,0 +1,15 @@
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# Blender 4.2.0 |
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# www.blender.org |
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usemtl (null) |
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o Plane |
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v -1.000000 -1.000000 -0.000000 |
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v 1.000000 -1.000000 -0.000000 |
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v -1.000000 1.000000 0.000000 |
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v 1.000000 1.000000 0.000000 |
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vn -0.0000 -0.0000 1.0000 |
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vt 0.000000 0.000000 |
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vt 1.000000 0.000000 |
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vt 1.000000 1.000000 |
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vt 0.000000 1.000000 |
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s 0 |
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f 1/1/1 2/2/1 4/3/1 3/4/1 |
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@ -0,0 +1,240 @@
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/*
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* Copyright (C) 2024 Riyyi |
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* |
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* SPDX-License-Identifier: MIT |
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*/ |
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#include <cstddef> // size_t |
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#include <cstdint> // int32_t, uint32_t, uint8_t |
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#include <string_view> |
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#include "glad/glad.h" |
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#include "glm/ext/matrix_float2x2.hpp" // glm::mat2 |
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#include "glm/ext/matrix_float3x3.hpp" // glm::mat3 |
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#include "glm/gtc/type_ptr.hpp" // glm::value_ptr |
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#include "ruc/meta/assert.h" |
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#include "inferno/render/buffer.h" |
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#include "inferno/render/uniformbuffer.h" |
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namespace Inferno { |
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Uniformbuffer::Uniformbuffer(s) |
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{ |
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// Get maximum uniformbuffer bindings the GPU supports
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int32_t maxBindingPoints = 0; |
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glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, &maxBindingPoints); |
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m_maxBindingPoints = static_cast<uint8_t>(maxBindingPoints); |
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} |
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Uniformbuffer::~Uniformbuffer() |
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{ |
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for (const auto& [_, block] : m_blocks) { |
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glDeleteBuffers(1, &block.id); |
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} |
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m_blocks.clear(); |
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} |
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// -----------------------------------------
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void Uniformbuffer::setLayout(std::string_view blockName, const UniformbufferBlock& block) |
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{ |
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VERIFY(block.size && block.bindingPoint && block.uniformLocations.size(), |
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"invalid uniformbuffer block definition: {}", blockName); |
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VERIFY(block.bindingPoint < m_maxBindingPoints, |
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"uniformbuffer exceeded binding points: {}/{}", block.bindingPoint, m_maxBindingPoints); |
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m_blocks[blockName] = block; |
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} |
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void Uniformbuffer::setLayout(std::string_view blockName, uint8_t bindingPoint, const BufferLayout& layout) |
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{ |
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VERIFY(bindingPoint < m_maxBindingPoints, |
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"uniformbuffer exceeded binding points: {}/{}", bindingPoint, m_maxBindingPoints); |
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if (!exists(blockName)) { |
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m_blocks[blockName] = {}; |
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} |
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UniformbufferBlock& block = m_blocks[blockName]; |
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block.bindingPoint = bindingPoint; |
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|
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// Example block layout:
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// - mat3
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// - float
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// - vec2
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// - vec2
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// - float
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// Chunks, 4 slots, 4 bytes per slot
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// [x][x][x][ ] #1
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// [x][x][x][ ] #2
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// [x][x][x][ ] #3
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// [x][ ][x][x] #4
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// [x][x][x][ ] #5
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size_t chunk = 0; |
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uint8_t offset = 0; |
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for (auto it = layout.begin(); it != layout.end(); ++it) { |
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BufferElementType type = it->type(); |
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const std::string& name = it->name(); |
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|
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// Calculate offset
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switch (type) { |
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// Scalar 1
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case BufferElementType::Bool: |
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case BufferElementType::Int: |
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case BufferElementType::Uint: |
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case BufferElementType::Float: { |
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// Offset
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block.uniformLocations[name] = (chunk * 16) + (offset * 4); |
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// Jump
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offset += 1; |
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break; |
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} |
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// Scalar 2
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case BufferElementType::Bool2: |
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case BufferElementType::Int2: |
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case BufferElementType::Uint2: |
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case BufferElementType::Vec2: { |
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// Add padding
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if (offset == 1) { |
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offset++; |
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} |
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if (offset == 3) { |
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offset = 0; |
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chunk++; |
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} |
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// Offset
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block.uniformLocations[name] = (chunk * 16) + (offset * 4); |
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// Jump
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offset += 2; |
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break; |
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} |
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// Scalar 3
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case BufferElementType::Bool3: |
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case BufferElementType::Int3: |
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case BufferElementType::Uint3: |
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case BufferElementType::Vec3: { |
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// Add padding
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if (offset != 0) { |
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offset = 0; |
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chunk++; |
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} |
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// Offset
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block.uniformLocations[name] = (chunk * 16) + (offset * 4); |
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// Jump
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offset += 3; |
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break; |
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} |
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// Scalar 4
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case BufferElementType::Bool4: |
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case BufferElementType::Int4: |
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case BufferElementType::Uint4: |
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case BufferElementType::Vec4: { |
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// Add padding
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if (offset != 0) { |
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offset = 0; |
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chunk++; |
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} |
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// Offset
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block.uniformLocations[name] = (chunk * 16) + (offset * 4); |
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// Jump
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offset += 4; |
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break; |
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} |
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// Array types
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case BufferElementType::Mat2: |
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case BufferElementType::Mat3: |
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case BufferElementType::Mat4: { |
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// Add padding
|
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if (offset != 0) { |
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offset = 0; |
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chunk++; |
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} |
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// Offset
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block.uniformLocations[name] = (chunk * 16) + (offset * 4); |
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|
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// Additional rows
|
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if (type == BufferElementType::Mat2) { |
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chunk += 1; |
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} |
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else if (type == BufferElementType::Mat3) { |
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chunk += 2; |
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} |
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else { |
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chunk += 3; |
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} |
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|
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// Jump
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offset += 4; |
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break; |
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} |
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// TODO: Implement these types
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case BufferElementType::Double: |
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case BufferElementType::Vec2Double: |
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case BufferElementType::Vec3Double: |
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case BufferElementType::Vec4Double: |
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case BufferElementType::MatDouble2: |
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case BufferElementType::MatDouble3: |
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case BufferElementType::MatDouble4: |
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VERIFY_NOT_REACHED(); |
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case BufferElementType::None: |
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VERIFY_NOT_REACHED(); |
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}; |
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|
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// Overflow slots to next chunk
|
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if (offset > 3) { |
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offset = 0; |
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chunk++; |
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} |
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} |
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|
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// Pad the end of the buffer
|
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if (offset != 0) { |
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offset = 0; |
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chunk++; |
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} |
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|
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block.size = chunk * 16; |
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} |
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|
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void Uniformbuffer::create(std::string_view blockName) |
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{ |
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VERIFY(exists(blockName), "uniformbuffer block doesnt exist"); |
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|
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UniformbufferBlock& block = m_blocks[blockName]; |
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|
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if (block.id != 0) { |
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glDeleteBuffers(1, &block.id); |
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} |
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|
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// Allocate buffer
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block.id = UINT_MAX; |
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glGenBuffers(1, &block.id); |
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glBindBuffer(GL_UNIFORM_BUFFER, block.id); |
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glBufferData(GL_UNIFORM_BUFFER, block.size, NULL, GL_DYNAMIC_DRAW); |
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glBindBuffer(GL_UNIFORM_BUFFER, 0); |
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|
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// Bind buffer to binding point
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glBindBufferBase(GL_UNIFORM_BUFFER, block.bindingPoint, block.id); |
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} |
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void Uniformbuffer::setValue(std::string_view blockName, std::string_view member, bool value) |
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{ |
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setValue(blockName, member, static_cast<uint32_t>(value), sizeof(uint32_t)); |
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} |
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|
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void Uniformbuffer::setValue(std::string_view blockName, std::string_view member, glm::mat2 value) |
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{ |
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setValue(blockName, member, static_cast<glm::mat4>(value), sizeof(glm::vec4) * 2); |
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} |
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|
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void Uniformbuffer::setValue(std::string_view blockName, std::string_view member, glm::mat3 value) |
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{ |
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setValue(blockName, member, static_cast<glm::mat4>(value), sizeof(glm::vec4) * 3); |
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} |
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|
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} // namespace Inferno
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@ -0,0 +1,130 @@
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/*
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* Copyright (C) 2024 Riyyi |
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* |
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* SPDX-License-Identifier: MIT |
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*/ |
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|
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#include <cstddef> // size_t |
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#include <cstdint> // uint8_t, uint32_t |
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#include <string> |
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#include <string_view> |
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#include <unordered_map> |
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|
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#include "glad/glad.h" |
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#include "glm/ext/matrix_float2x2.hpp" // glm::mat2 |
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#include "glm/ext/matrix_float3x3.hpp" // glm::mat3 |
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#include "glm/ext/vector_float3.hpp" // glm::vec3 |
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#include "ruc/singleton.h" |
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|
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#include "inferno/render/buffer.h" |
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|
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#define CHECK_SET_CALL(blockName, member) \ |
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VERIFY(exists(blockName), "uniformbuffer block doesnt exist"); \
|
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const UniformbufferBlock& block = m_blocks[blockName]; \
|
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VERIFY(block.uniformLocations.find(member.data()) != block.uniformLocations.end(), \
|
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"uniformbuffer block member doesnt exist"); |
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|
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namespace Inferno { |
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|
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// Uniform block layouts, using std140 memory layout rules
|
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|
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#define MAX_DIRECTIONAL_LIGHTS 32 |
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struct UniformDirectionalLight { |
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glm::vec3 direction { 0 }; |
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float __padding0 { 0 }; |
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|
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glm::vec3 ambient { 0 }; |
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float __padding1 { 0 }; |
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glm::vec3 diffuse { 0 }; |
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float __padding2 { 0 }; |
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glm::vec3 specular { 0 }; |
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float __padding3 { 0 }; |
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}; |
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|
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// -----------------------------------------
|
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|
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struct UniformbufferBlock { |
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uint32_t id { 0 }; |
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uint32_t size { 0 }; |
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uint8_t bindingPoint { 0 }; |
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std::unordered_map<std::string, uint32_t> uniformLocations {}; |
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}; |
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|
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class Uniformbuffer final : public ruc::Singleton<Uniformbuffer> { // Uniform Buffer Object, UBO
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public: |
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Uniformbuffer(s); |
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~Uniformbuffer(); |
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|
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void setLayout(std::string_view blockName, const UniformbufferBlock& block); |
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void setLayout(std::string_view blockName, uint8_t bindingPoint, const BufferLayout& layout); |
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void create(std::string_view blockName); |
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|
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template<typename T> // Capture value by reference, instead of decaying to pointer
|
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void setValue(std::string_view blockName, std::string_view member, T&& value, size_t size = 0) |
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{ |
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CHECK_SET_CALL(blockName, member); |
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|
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glBindBuffer(GL_UNIFORM_BUFFER, block.id); |
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glBufferSubData(GL_UNIFORM_BUFFER, block.uniformLocations.at(member.data()), (size) ? size : sizeof(T), &value); |
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glBindBuffer(GL_UNIFORM_BUFFER, 0); |
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} |
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// Exceptions:
|
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void setValue(std::string_view blockName, std::string_view member, bool value); |
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void setValue(std::string_view blockName, std::string_view member, glm::mat2 value); |
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void setValue(std::string_view blockName, std::string_view member, glm::mat3 value); |
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|
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bool exists(std::string_view blockName) const { return m_blocks.find(blockName) != m_blocks.end(); } |
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|
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private: |
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uint8_t m_maxBindingPoints { 0 }; |
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std::unordered_map<std::string_view, UniformbufferBlock> m_blocks; |
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}; |
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|
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} // namespace Inferno
|
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|
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#if 0 |
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|
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// -----------------------------------------
|
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// Example usage:
|
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|
||||
Uniformbuffer::the().setLayout( |
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"ExampleBlock", 0, |
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{ |
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{ BufferElementType::Mat3, "a" }, |
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{ BufferElementType::Float, "b" }, |
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{ BufferElementType::Vec2, "c" }, |
||||
{ BufferElementType::Vec2, "d" }, |
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{ BufferElementType::Float, "e" }, |
||||
}); |
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Uniformbuffer::the().create("ExampleBlock"); |
||||
|
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#endif |
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|
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// -----------------------------------------
|
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// Memory alignment of uniform blocks using std140
|
||||
//
|
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// Main points:
|
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// - Memory is organized into chunks.
|
||||
// - A block is at least the size of 1 chunk.
|
||||
// - One chunk has 4 slots, 4 bytes per slot.
|
||||
// - Can't fit? Move to next chunk.
|
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//
|
||||
// The rules:
|
||||
// 1. Scalar (bool, int, uint, float) takes up 1 slot, can appear after anything
|
||||
// 2. Vec2 takes up 2 slots, in first or last half of a chunk
|
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// 3. Vec3 takes up 3 slots, only at the start of a chunk
|
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// 4. Everything else:
|
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// - Take up maxumum room
|
||||
// - As often as needed
|
||||
// - Add padding as needed
|
||||
// 5. Mat3 (or any matrix) are treated like arrays
|
||||
// 6. Each member of *any* array gets its own chunk
|
||||
|
||||
// TODO: How do double types work?
|
||||
|
||||
// -----------------------------------------
|
||||
// References:
|
||||
// - https://learnopengl.com/Advanced-OpenGL/Advanced-GLSL
|
||||
// - https://www.khronos.org/opengl/wiki/Interface_Block_(GLSL)#Memory_layout
|
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// - https://www.oreilly.com/library/view/opengl-programming-guide/9780132748445/app09lev1sec2.html (The std140 Layout Rules)
|
||||
// - https://www.youtube.com/watch?v=JPvbRko9lBg (WebGL 2: Uniform Buffer Objects)
|
||||
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