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-rw-r--r--source/main.cpp251
-rw-r--r--source/shaders/fbo.fs.glsl2
2 files changed, 242 insertions, 11 deletions
diff --git a/source/main.cpp b/source/main.cpp
index 650799d..ede861f 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -559,10 +559,16 @@ int main(int argc, char* argv[])
char* blend_shader_source = (char*)SDL_LoadFile("./source/shaders/blend_test.fs.glsl", &read_count);
char* fbo_vs = (char*)SDL_LoadFile("./source/shaders/fbo.vs.glsl", &read_count);
char* fbo_fs = (char*)SDL_LoadFile("./source/shaders/fbo.fs.glsl", &read_count);
+ char* cubemap_vs = (char*)SDL_LoadFile("./source/shaders/cubemap.vs.glsl", &read_count);
+ 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);
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);
printf("Successfully compiled shaders.\n");
@@ -610,7 +616,8 @@ int main(int argc, char* argv[])
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, // top-left
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f // bottom-left
};
- float planeVertices[] = {
+
+ float planeVertices[] = {
// positions // texture Coords (note we set these higher than 1 (together with GL_REPEAT as texture wrapping mode). this will cause the floor texture to repeat)
// BottomFace
-5.0f, -1.0f, -5.0f, 0.0f, 2.0f, // top-right
@@ -627,6 +634,7 @@ int main(int argc, char* argv[])
-5.0f, -0.5f, -5.0f, 0.0f, 2.0f, // top-left
-5.0f, -0.5f, 5.0f, 0.0f, 0.0f // bottom-left
};
+
float quadVertices[] = {
// Front face
-0.5f, -0.5f, 0.0f, 0.0f, // bottom-left
@@ -643,6 +651,7 @@ int main(int argc, char* argv[])
-0.5f, -0.5f, 0.0f, 0.0f, // bottom-left
-0.5f, 0.5f, 0.0f, 1.0f, // top-left
};
+
float fboVertices[] = {
-1.0f, -1.0f, 0.0f, 0.0f, // bottom-left
1.0f, -1.0f, 1.0f, 0.0f, // bottom-right
@@ -651,9 +660,108 @@ int main(int argc, char* argv[])
-1.0f, 1.0f, 0.0f, 1.0f, // top-left
-1.0f, -1.0f, 0.0f, 0.0f, // bottom-left
};
+
+ float skyboxVertices[] = {
+ // positions
+ -1.0f, 1.0f, -1.0f,
+ -1.0f, -1.0f, -1.0f,
+ 1.0f, -1.0f, -1.0f,
+ 1.0f, -1.0f, -1.0f,
+ 1.0f, 1.0f, -1.0f,
+ -1.0f, 1.0f, -1.0f,
+
+ -1.0f, -1.0f, 1.0f,
+ -1.0f, -1.0f, -1.0f,
+ -1.0f, 1.0f, -1.0f,
+ -1.0f, 1.0f, -1.0f,
+ -1.0f, 1.0f, 1.0f,
+ -1.0f, -1.0f, 1.0f,
+
+ 1.0f, -1.0f, -1.0f,
+ 1.0f, -1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, -1.0f,
+ 1.0f, -1.0f, -1.0f,
+
+ -1.0f, -1.0f, 1.0f,
+ -1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f,
+ 1.0f, -1.0f, 1.0f,
+ -1.0f, -1.0f, 1.0f,
+
+ -1.0f, 1.0f, -1.0f,
+ 1.0f, 1.0f, -1.0f,
+ 1.0f, 1.0f, 1.0f,
+ 1.0f, 1.0f, 1.0f,
+ -1.0f, 1.0f, 1.0f,
+ -1.0f, 1.0f, -1.0f,
+
+ -1.0f, -1.0f, -1.0f,
+ -1.0f, -1.0f, 1.0f,
+ 1.0f, -1.0f, -1.0f,
+ 1.0f, -1.0f, -1.0f,
+ -1.0f, -1.0f, 1.0f,
+ 1.0f, -1.0f, 1.0f
+ };
+ float reflVertices[] = {
+ // positions // texture Coords (note we set these higher than 1 (together with GL_REPEAT as texture wrapping mode). this will cause the floor texture to repeat)
+ // Top face
+ //-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-right
+ // 5.0f, 0.5f, -5.0f, 0.0f, 1.0f, 0.0f,// top-right
+ // 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
+ // 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
+ 0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, // bottom-right
+ 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, // top-right
+ -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-left
+ // Front 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, // bottom-right
+ 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, // top-right
+ 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, // top-right
+ -0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, // top-left
+ -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, // bottom-left
+ // 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
+ // Bottom face
+ -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, // top-left
+ 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-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
+ // 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
+ };
+
stbi_set_flip_vertically_on_load(1);
- u32 cube_vao, cube_vbo, plane_vao, plane_vbo, quad_vao, quad_vbo, fbo_vao, fbo_vbo;
+ 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;
glGenVertexArrays(1, &cube_vao);
glGenBuffers(1, &cube_vbo);
@@ -704,6 +812,30 @@ int main(int argc, char* argv[])
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)(2*sizeof(float)));
glBindVertexArray(0);
+ // skybox objects
+ glGenVertexArrays(1, &skybox_vao);
+ glGenBuffers(1, &skybox_vbo);
+
+ glBindVertexArray(skybox_vao);
+ glBindBuffer(GL_ARRAY_BUFFER, skybox_vbo);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(skyboxVertices), &skyboxVertices, GL_STATIC_DRAW);
+ glEnableVertexAttribArray(0);
+ glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+ glBindVertexArray(0);
+
+ // reflective surface objects
+ glGenVertexArrays(1, &refl_vao);
+ glGenBuffers(1, &refl_vbo);
+
+ glBindVertexArray(refl_vao);
+ glBindBuffer(GL_ARRAY_BUFFER, refl_vbo);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(reflVertices), &reflVertices, 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);
@@ -752,12 +884,13 @@ int main(int argc, char* argv[])
// objects
Vec3 model_translations[] = {
- Vec3{ 0.5, 0.0, 0.0}, //origin square
- Vec3{ -1.0, 0.0, -1.0}, // plane
- Vec3{ -1.0, 0.0, -0.5}, // window between squares
- Vec3{ 0.0, 0.0, 3.0}, //window infront of origin square
- Vec3{ -2.5, 0.0, -0.5}, // square to the left
- Vec3{ -1.0, 0.0, -1.5}, // random square behind window between squares
+ Vec3{ 0.5, 0.0, 0.0}, // 0: origin square
+ Vec3{ -1.0, 0.0, -1.0}, // 1: plane
+ Vec3{ -1.0, 0.0, -0.5}, // 2: window between squares
+ Vec3{ 0.0, 0.0, 3.0}, // 3: window infront of origin square
+ 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
};
r32 FOV = 90.0;
@@ -788,6 +921,15 @@ int main(int argc, char* argv[])
glUseProgram(blend_shader_program);
proj_loc = glGetUniformLocation(blend_shader_program, "Projection");
glUniformMatrix4fv(proj_loc, 1, GL_TRUE, proj.buffer);
+
+ glUseProgram(cubemap_shader_program);
+ proj_loc = glGetUniformLocation(cubemap_shader_program, "Projection");
+ glUniformMatrix4fv(proj_loc, 1, GL_TRUE, proj.buffer);
+
+ glUseProgram(refl_shader_program);
+ proj_loc = glGetUniformLocation(refl_shader_program, "Projection");
+ glUniformMatrix4fv(proj_loc, 1, GL_TRUE, proj.buffer);
+
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
@@ -826,6 +968,60 @@ int main(int argc, char* argv[])
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ // generate_cubemap
+ const char *cm_face_right = "assets/skybox/right.jpg";
+ const char *cm_face_left = "assets/skybox/left.jpg";
+ const char *cm_face_top = "assets/skybox/top.jpg";
+ const char *cm_face_bottom = "assets/skybox/bottom.jpg";
+ const char *cm_face_back = "assets/skybox/back.jpg";
+ const char *cm_face_front = "assets/skybox/front.jpg";
+
+ u32 cm_tex_id;
+ {
+ stbi_set_flip_vertically_on_load(0);
+ glGenTextures(1, &cm_tex_id);
+ glBindTexture(GL_TEXTURE_CUBE_MAP, cm_tex_id);
+ int cm_width, cm_height, cm_nrChannels;
+ unsigned char *data;
+ // right face
+ data = stbi_load(cm_face_right, &cm_width, &cm_height, &cm_nrChannels, 0);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + 0, 0, GL_RGB, cm_width, cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+ // left face
+ data = stbi_load(cm_face_left, &cm_width, &cm_height, &cm_nrChannels, 0);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + 1, 0, GL_RGB, cm_width, cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+ // top face
+ data = stbi_load(cm_face_top, &cm_width, &cm_height, &cm_nrChannels, 0);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + 2, 0, GL_RGB, cm_width, cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+ // bottom face
+ data = stbi_load(cm_face_bottom, &cm_width, &cm_height, &cm_nrChannels, 0);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + 3, 0, GL_RGB, cm_width, cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+ // back face
+ data = stbi_load(cm_face_back, &cm_width, &cm_height, &cm_nrChannels, 0);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + 4, 0, GL_RGB, cm_width, cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+ // front face
+ data = stbi_load(cm_face_front, &cm_width, &cm_height, &cm_nrChannels, 0);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + 5, 0, GL_RGB, cm_width, cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+
+ // texture filtering methods
+ glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+
+ glUseProgram(cubemap_shader_program);
+ glActiveTexture(GL_TEXTURE0);
+ s32 skybox_loc = glGetUniformLocation(cubemap_shader_program, "skybox");
+ glUniform1i(skybox_loc, 0);
+ stbi_set_flip_vertically_on_load(1);
+ }
+
+ {
+ glUseProgram(refl_shader_program);
+ s32 skybox_loc = glGetUniformLocation(refl_shader_program, "skybox");
+ glUniform1i(skybox_loc, 0);
+ }
+
u8 game_running = true;
u8 hold_lshift = false;
@@ -953,14 +1149,25 @@ int main(int argc, char* argv[])
view_loc = glGetUniformLocation(blend_shader_program, "View");
glUniformMatrix4fv(view_loc, 1, GL_TRUE, view.buffer);
+ glUseProgram(refl_shader_program);
+ view_loc = glGetUniformLocation(refl_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;
+ view.xyzw[1].w = 0.0f;
+ view.xyzw[2].w = 0.0f;
+ glUniformMatrix4fv(view_loc, 1, GL_TRUE, view.buffer);
+
time_prev = time_curr;
// OUTPUT
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
- glEnable(GL_DEPTH_TEST);
glClearColor(1.0f, 0.6f, .6f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
{ //plane
glUseProgram(shader_program);
@@ -1022,6 +1229,31 @@ int main(int argc, char* argv[])
glBindTexture(GL_TEXTURE_2D, cube_tex_id);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
+ { // reflective plane
+ glUseProgram(refl_shader_program);
+ Vec3 translation_iter = model_translations[6];
+ 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(refl_shader_program, "Model");
+ glUniformMatrix4fv(model_loc, 1, GL_TRUE, model.buffer);
+
+ 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);
+ }
+ {
+ glDepthFunc(GL_LEQUAL);
+ glUseProgram(cubemap_shader_program);
+ glActiveTexture(GL_TEXTURE0);
+ glBindVertexArray(skybox_vao);
+ glBindTexture(GL_TEXTURE_CUBE_MAP, cm_tex_id);
+ glDrawArrays(GL_TRIANGLES, 0, 36);
+ glDepthFunc(GL_LESS);
+ }
+
// @note: this is to demonstrate the limitations of blending with the depth buffer.
// Currently, this will show a weird behavior where since we render the transparent object
// closest to the camera first, the second window, further from the player will be discarded by the
@@ -1059,7 +1291,6 @@ int main(int argc, char* argv[])
glDrawArrays(GL_TRIANGLES, 0, 12);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
-
// draw everything to a framebuffer object
glDisable(GL_DEPTH_TEST);
glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
diff --git a/source/shaders/fbo.fs.glsl b/source/shaders/fbo.fs.glsl
index afb9e08..e12ad33 100644
--- a/source/shaders/fbo.fs.glsl
+++ b/source/shaders/fbo.fs.glsl
@@ -68,5 +68,5 @@ vec4 filter_kernal_effects()
}
void main() {
- FragColor = filter_kernal_effects();
+ FragColor = texture(TexId, TexCoords);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-23 06:50:19 +0000