summary refs log tree commit diff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--src/GFX/Mesh.hpp22
-rw-r--r--src/Math/MVP.cpp20
-rw-r--r--src/Math/MVP.hpp3
-rw-r--r--src/Util/ImageViewer.cpp38
-rw-r--r--src/Util/ImageViewer.hpp9
-rw-r--r--src/main.cpp13
6 files changed, 83 insertions, 22 deletions
diff --git a/src/GFX/Mesh.hpp b/src/GFX/Mesh.hpp
index 9d640b6..36a7dac 100644
--- a/src/GFX/Mesh.hpp
+++ b/src/GFX/Mesh.hpp
@@ -12,11 +12,25 @@ public:
     struct Attribute {
         template<size_t S = 3, typename T = float>
         Attribute(
-            std::vector<Vector<S, T>> data
-        ) : data((T*) data.data()),
-            data_size(data.size()),
+            std::vector<Vector<S, T>> v
+        ) : data_size(v.size()),
             attribute_size(S),
-            type_size(sizeof(T)) {};
+            type_size(sizeof(T)) {
+            data = copy(v.data(), v.size() * S * type_size);
+        };
+
+        Attribute(
+            const Attribute& other
+        ) : data(copy(other.data, other.data_size * other.attribute_size * other.type_size)),
+            data_size(other.data_size),
+            attribute_size(other.attribute_size),
+            type_size(other.type_size) {};
+
+        static void* copy(void* ptr, uint32_t size) {
+            auto* buffer = new uint8_t[size];
+            std::copy((uint8_t*)ptr, (uint8_t*)ptr + size, buffer);
+            return buffer;
+        }
 
         void* data;
         long data_size;
diff --git a/src/Math/MVP.cpp b/src/Math/MVP.cpp
index de9f2ee..754c656 100644
--- a/src/Math/MVP.cpp
+++ b/src/Math/MVP.cpp
@@ -18,7 +18,7 @@ Matrix<4, 4> view(Vector<3> position, Rotation angles) {
     return rotation * transformation;
 }
 
-Matrix<4, 4> projection(float aspect, float fov, float near, float far) {
+Matrix<4, 4> perspective_projection(float aspect, float fov, float near, float far) {
     auto fov_radians = Math::radians(fov);
 
     float x_scale = 1.0f / (tan(fov_radians / 2.0f) * aspect);
@@ -38,4 +38,22 @@ Matrix<4, 4> projection(float aspect, float fov, float near, float far) {
     return projection;
 }
 
+Matrix<4, 4> orthographic_projection(float width, float height, float near, float far) {
+    float x_scale = 2.0f / width;
+    float y_scale = 2.0f / -height;
+
+    float frustum_length = far - near;
+    float z_near = -(far + near) / frustum_length;
+    float z_far = -2 / frustum_length;
+
+    Matrix<4, 4> projection{
+            x_scale, 0.0f,    0.0f,   -1.0f,
+            0.0f,    y_scale, 0.0f,   1.0f,
+            0.0f,    0.0f,    z_near, z_far,
+            0.0f,    0.0f,    0.0f,   1.0f,
+    };
+
+    return projection;
+}
+
 }
diff --git a/src/Math/MVP.hpp b/src/Math/MVP.hpp
index c3fb64f..0abad66 100644
--- a/src/Math/MVP.hpp
+++ b/src/Math/MVP.hpp
@@ -6,6 +6,7 @@ namespace Math::MVP {
 
 Matrix<4, 4> model(Vector<3> position, Rotation angles);
 Matrix<4, 4> view(Vector<3> position, Rotation angles);
-Matrix<4, 4> projection(float aspect, float fov, float near, float far);
+Matrix<4, 4> perspective_projection(float aspect, float fov, float near, float far);
+Matrix<4, 4> orthographic_projection(float width, float height, float near, float far);
 
 }
diff --git a/src/Util/ImageViewer.cpp b/src/Util/ImageViewer.cpp
index 76faa3e..b4d8c6e 100644
--- a/src/Util/ImageViewer.cpp
+++ b/src/Util/ImageViewer.cpp
@@ -1,8 +1,29 @@
 #include <GL/glew.h>
 #include "ImageViewer.hpp"
+#include "../Math/MVP.hpp"
 
 namespace MC::Util {
 
+ImageViewer::ImageViewer(
+        GFX::Image::RawImage& image
+) : m_texture(image),
+    m_program(
+        {GFX::Shading::Shader::Type::Vertex, ImageViewer::vertex},
+        {GFX::Shading::Shader::Type::Fragment, ImageViewer::fragment}
+    ),
+    m_mesh(GFX::Binder::load(default_mesh)) {
+    m_program.bind();
+    auto model_uniform = m_program.uniform("model_matrix");
+    auto view_uniform = m_program.uniform("view_matrix");
+    auto projection_uniform = m_program.uniform("projection_matrix");
+
+    model_uniform.set(Math::MVP::model({}, {}));
+    view_uniform.set(Math::MVP::view({}, {}));
+    projection_uniform.set(Math::MVP::orthographic_projection(1000, 800, 0.0f, 100.0f));
+
+    m_program.unbind();
+}
+
 void ImageViewer::render() {
     m_program.bind();
     m_texture.bind();
@@ -16,10 +37,10 @@ void ImageViewer::render() {
 GFX::Mesh ImageViewer::create_default_mesh() {
     return {{
         std::vector<Vector<3>>{
-            {0.0f,  1.0f, 0.0f},   // top left
-            {0.0f, 0.0f, 0.0f},   // bottom left
-            {1.0f, 0.0f, 0.0f},   // bottom right
-            {1.0f,  0.0f, 0.0f } // top right
+            {300.0f, 200.0f,   0.0f},   // top left
+            {300.0f, 600.0f, 0.0f},   // bottom left
+            {700.0f, 600.0f, 0.0f},   // bottom right
+            {700.0f, 200.0f,   0.0f } // top right
         },
         std::vector<Vector<2>>{
             {1.0f, 1.0f},
@@ -33,13 +54,17 @@ GFX::Mesh ImageViewer::create_default_mesh() {
 const char* ImageViewer::vertex = R"v(
 #version 330 core
 
+uniform mat4 model_matrix;
+uniform mat4 view_matrix;
+uniform mat4 projection_matrix;
+
 layout (location = 0) in vec3 position;
 layout (location = 1) in vec2 tex_coord;
 
 out vec2 frag_tex_coord;
 
 void main() {
-    gl_Position = vec4(position, 1.0);
+    gl_Position = projection_matrix * view_matrix * model_matrix * vec4(position, 1.0);
     frag_tex_coord = tex_coord;
 })v";
 
@@ -52,8 +77,7 @@ in vec2 frag_tex_coord;
 out vec4 color;
 
 void main() {
-    //color = texture(image, frag_tex_coord);
-    color = vec4(0.3, 0.5, 1.0, 1.0);
+    color = texture(image, frag_tex_coord);
 })f";
 
 }
\ No newline at end of file
diff --git a/src/Util/ImageViewer.hpp b/src/Util/ImageViewer.hpp
index d583aa8..cb2dda0 100644
--- a/src/Util/ImageViewer.hpp
+++ b/src/Util/ImageViewer.hpp
@@ -9,14 +9,7 @@ namespace MC::Util {
 
 class ImageViewer {
 public:
-    explicit ImageViewer(
-        GFX::Image::RawImage& image
-    ) : m_texture(image),
-        m_program(
-            {GFX::Shading::Shader::Type::Vertex, ImageViewer::vertex},
-            {GFX::Shading::Shader::Type::Fragment, ImageViewer::fragment}
-        ),
-        m_mesh(GFX::Binder::load(default_mesh)) {};
+    explicit ImageViewer(GFX::Image::RawImage& image);
 
     void render();
 private:
diff --git a/src/main.cpp b/src/main.cpp
index eafba6e..2589555 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -10,6 +10,7 @@
 #include "GFX/Texture.hpp"
 #include "GFX/Image/PPMParser.hpp"
 #include "World/World.hpp"
+#include "Util/ImageViewer.hpp"
 
 #define APP_NAME "Meowcraft"
 
@@ -49,6 +50,14 @@ void run() {
         glViewport(0, 0, w, h);
     });
 
+    auto example_image = MC::GFX::Image::RawImage(10, 10, 3);
+    for (uint8_t x = 0; x < 10; x++) {
+        for (uint8_t y = 0; y < 10; y++) {
+            example_image.add({static_cast<uint8_t>(x * 20), 0, static_cast<uint8_t>(y * 20)});
+        }
+    }
+    auto viewer = MC::Util::ImageViewer(example_image);
+
     auto image = MC::GFX::Image::PPMParser(MC::Assets::Images::atlas).parse();
     auto texture = MC::GFX::Texture(image);
 
@@ -69,7 +78,7 @@ void run() {
     auto sun_direction_uniform = program.uniform("sun_direction");
 
     program.bind();
-    auto projection = Math::MVP::projection(ASPECT, FOV, 0.1f, 1000.0f);
+    auto projection = Math::MVP::perspective_projection(ASPECT, FOV, 0.1f, 1000.0f);
     projection_uniform.set(projection);
 
     Vector<3> sun_direction{1.0f, -1.0f, 0.0f};
@@ -105,6 +114,8 @@ void run() {
             render(chunk.mesh.value(), texture);
         }
 
+        viewer.render();
+
         time++;
     }
 }
generated by cgit-pink 1.4.1 (git 2.36.1) at 2026-04-25 14:09:06 +0000