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-rw-r--r--source/main.cpp81
-rw-r--r--source/shaders/refr.fs.glsl15
-rw-r--r--source/shaders/refr.vs.glsl20
3 files changed, 107 insertions, 9 deletions
diff --git a/source/main.cpp b/source/main.cpp
index ede861f..b4b9e2c 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -563,12 +563,15 @@ int main(int argc, char* argv[])
char* cubemap_fs = (char*)SDL_LoadFile("./source/shaders/cubemap.fs.glsl", &read_count);
char* refl_vs = (char*)SDL_LoadFile("./source/shaders/refl.vs.glsl", &read_count);
char* refl_fs = (char*)SDL_LoadFile("./source/shaders/refl.fs.glsl", &read_count);
+ char* refr_vs = (char*)SDL_LoadFile("./source/shaders/refr.vs.glsl", &read_count);
+ char* refr_fs = (char*)SDL_LoadFile("./source/shaders/refr.fs.glsl", &read_count);
u32 shader_program = gl_shader_program(vertex_source, fragment_source);
u32 blend_shader_program = gl_shader_program(vertex_source, blend_shader_source);
u32 fbo_shader_program = gl_shader_program(fbo_vs, fbo_fs);
u32 cubemap_shader_program = gl_shader_program(cubemap_vs, cubemap_fs);
u32 refl_shader_program = gl_shader_program(refl_vs, refl_fs);
+ u32 refr_shader_program = gl_shader_program(refr_vs, refr_fs);
printf("Successfully compiled shaders.\n");
@@ -714,6 +717,7 @@ int main(int argc, char* argv[])
// 5.0f, 0.5f, 5.0f, 0.0f, 1.0f, 0.0f,// bottom-right
//-5.0f, 0.5f, -5.0f, 0.0f, 1.0f, 0.0f,// top-left
//-5.0f, 0.5f, 5.0f, 0.0f, 1.0f, 0.0f,// bottom-left
+#if REFLECTIVE_PLANE
// Back face
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, // Bottom-left
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, // top-right
@@ -749,19 +753,37 @@ int main(int argc, char* argv[])
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, // bottom-left
-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, // bottom-right
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, // top-right
+#endif
// Top face
- -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, // top-left
- 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, // bottom-right
- 0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, // top-right
- 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, // bottom-right
- -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, // top-left
- -0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f // bottom-left
+ -4.0f, 0.0f, -4.0f, 0.0f, 1.0f, 0.0f, // top-left
+ 4.0f, 0.0f, 4.0f, 0.0f, 1.0f, 0.0f, // bottom-right
+ 4.0f, 0.0f, -4.0f, 0.0f, 1.0f, 0.0f, // top-right
+ 4.0f, 0.0f, 4.0f, 0.0f, 1.0f, 0.0f, // bottom-right
+ -4.0f, 0.0f, -4.0f, 0.0f, 1.0f, 0.0f, // top-left
+ -4.0f, 0.0f, 4.0f, 0.0f, 1.0f, 0.0f // bottom-left
+ };
+
+ float refrVertices[] = {
+ // Left face
+ -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, // top-right
+ -0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f, // top-left
+ -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, // bottom-left
+ -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, // bottom-left
+ -0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f, // bottom-right
+ -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, // top-right
+ // Right face
+ -0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, // top-left
+ -0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, // bottom-right
+ -0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, // top-right
+ -0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, // bottom-right
+ -0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, // top-left
+ -0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, // bottom-left
};
stbi_set_flip_vertically_on_load(1);
u32 cube_vao, cube_vbo, plane_vao, plane_vbo, quad_vao, quad_vbo, fbo_vao, fbo_vbo,
- skybox_vao, skybox_vbo, refl_vao, refl_vbo;
+ skybox_vao, skybox_vbo, refl_vao, refl_vbo, refr_vao, refr_vbo;
glGenVertexArrays(1, &cube_vao);
glGenBuffers(1, &cube_vbo);
@@ -836,6 +858,19 @@ int main(int argc, char* argv[])
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3*sizeof(float)));
glBindVertexArray(0);
+ // refractive surface objects
+ glGenVertexArrays(1, &refr_vao);
+ glGenBuffers(1, &refr_vbo);
+
+ glBindVertexArray(refr_vao);
+ glBindBuffer(GL_ARRAY_BUFFER, refr_vbo);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(refrVertices), &refrVertices, GL_STATIC_DRAW);
+ glEnableVertexAttribArray(0);
+ glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);
+ glEnableVertexAttribArray(1);
+ glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3*sizeof(float)));
+ glBindVertexArray(0);
+
u32 window_tex_id;
glGenTextures(1, &window_tex_id);
glActiveTexture(GL_TEXTURE2);
@@ -869,7 +904,6 @@ int main(int argc, char* argv[])
printf("failed to load image texture at path: %s", path);
stbi_image_free(data);
}
-
}
u32 cube_tex_id;
@@ -891,6 +925,7 @@ int main(int argc, char* argv[])
Vec3{ -2.5, 0.0, -0.5}, // 4: square to the left
Vec3{ -1.0, 0.0, -1.5}, // 5: random square behind window between squares
Vec3{ -1.0, 0.0, -8.0}, // 6: reflective plane
+ Vec3{ -1.0, 2.0, -8.0}, // 6: refractive "window"
};
r32 FOV = 90.0;
@@ -930,6 +965,9 @@ int main(int argc, char* argv[])
proj_loc = glGetUniformLocation(refl_shader_program, "Projection");
glUniformMatrix4fv(proj_loc, 1, GL_TRUE, proj.buffer);
+ glUseProgram(refr_shader_program);
+ proj_loc = glGetUniformLocation(refr_shader_program, "Projection");
+ glUniformMatrix4fv(proj_loc, 1, GL_TRUE, proj.buffer);
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
@@ -1022,6 +1060,12 @@ int main(int argc, char* argv[])
glUniform1i(skybox_loc, 0);
}
+ {
+ glUseProgram(refr_shader_program);
+ s32 skybox_loc = glGetUniformLocation(refr_shader_program, "skybox");
+ glUniform1i(skybox_loc, 0);
+ }
+
u8 game_running = true;
u8 hold_lshift = false;
@@ -1153,6 +1197,10 @@ int main(int argc, char* argv[])
view_loc = glGetUniformLocation(refl_shader_program, "View");
glUniformMatrix4fv(view_loc, 1, GL_TRUE, view.buffer);
+ glUseProgram(refr_shader_program);
+ view_loc = glGetUniformLocation(refr_shader_program, "View");
+ glUniformMatrix4fv(view_loc, 1, GL_TRUE, view.buffer);
+
glUseProgram(cubemap_shader_program);
view_loc = glGetUniformLocation(cubemap_shader_program, "View");
view.xyzw[0].w = 0.0f;
@@ -1242,7 +1290,22 @@ int main(int argc, char* argv[])
uint32_t camera_pos_loc = glGetUniformLocation(refl_shader_program, "cameraPos");
glUniform3fv(camera_pos_loc, 1, camera_pos.data);
glBindVertexArray(refl_vao);
- glDrawArrays(GL_TRIANGLES, 0, 36);
+ glDrawArrays(GL_TRIANGLES, 0, 6);
+ }
+ { // reflective plane
+ glUseProgram(refr_shader_program);
+ Vec3 translation_iter = model_translations[7];
+ Mat4 model = init_value4m(1.0);
+ Mat4 model_translation = translation_matrix4m(translation_iter.x, translation_iter.y, translation_iter.z);
+
+ model = multiply4m(model_translation, model);
+ uint32_t model_loc = glGetUniformLocation(refr_shader_program, "Model");
+ glUniformMatrix4fv(model_loc, 1, GL_TRUE, model.buffer);
+
+ uint32_t camera_pos_loc = glGetUniformLocation(refr_shader_program, "cameraPos");
+ glUniform3fv(camera_pos_loc, 1, camera_pos.data);
+ glBindVertexArray(refr_vao);
+ glDrawArrays(GL_TRIANGLES, 0, 12);
}
{
glDepthFunc(GL_LEQUAL);
diff --git a/source/shaders/refr.fs.glsl b/source/shaders/refr.fs.glsl
new file mode 100644
index 0000000..6747ded
--- /dev/null
+++ b/source/shaders/refr.fs.glsl
@@ -0,0 +1,15 @@
+#version 330 core
+
+in vec3 Normal;
+in vec3 Position;
+
+uniform samplerCube skybox;
+uniform vec3 cameraPos;
+out vec4 FragColor;
+
+void main() {
+ float refr_ratio = 1.0/1.52;
+ vec3 I = normalize(Position - cameraPos);
+ vec3 R = refract(I, normalize(Normal), refr_ratio);
+ FragColor = vec4(texture(skybox, R).rgb, 1.0);
+};
diff --git a/source/shaders/refr.vs.glsl b/source/shaders/refr.vs.glsl
new file mode 100644
index 0000000..0554f0a
--- /dev/null
+++ b/source/shaders/refr.vs.glsl
@@ -0,0 +1,20 @@
+#version 330 core
+layout(location=0) in vec3 aPos;
+layout(location=1) in vec3 aNormal;
+
+uniform mat4 View;
+uniform mat4 Model;
+uniform mat4 Projection;
+
+out vec3 Normal;
+out vec3 Position;
+
+void main() {
+ // @note: This is the calculation for getting the normal vector
+ // one that is unaffected by non-uniform scaling that is.
+ // look at the lighting chapter in learnopengl.com to understand this more
+ Normal = mat3(transpose(inverse(Model))) * aNormal;
+ Position = vec3(Model * vec4(aPos, 1.0));
+ gl_Position = Projection * View * Model * vec4(aPos, 1.0);
+};
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-23 07:03:55 +0000