Index: new-game.cpp =================================================================== --- new-game.cpp (revision 485424b115047116d3e57c15d4a4583a1018a048) +++ new-game.cpp (revision c62eee67d1b1bb7ea638fbbb17aa6b5bf8a110a6) @@ -3,5 +3,6 @@ #include "stb_image.h" -#include // glm::mat4 +#define GLM_SWIZZLE +#include #include #include @@ -21,5 +22,15 @@ #define ONE_DEG_IN_RAD (2.0 * M_PI) / 360.0 // 0.017444444 + const bool FULLSCREEN = false; +int width = 640; +int height = 480; + +vec3 cam_pos; + +vec3 face_point1, face_point2, face_point3; + +mat4 view_mat; +mat4 proj_mat; GLuint loadShader(GLenum type, string file); @@ -29,4 +40,55 @@ void glfw_error_callback(int error, const char* description) { gl_log_err("GLFW ERROR: code %i msg: %s\n", error, description); +} + +void mouse_button_callback(GLFWwindow* window, int button, int action, int mods) { + double mouse_x, mouse_y; + glfwGetCursorPos(window, &mouse_x, &mouse_y); + + if (button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS) { + cout << "Mouse clicked (" << mouse_x << "," << mouse_y << ")" << endl; + + float x = (2.0f*mouse_x) / width - 1.0f; + float y = 1.0f - (2.0f*mouse_y) / height; + + vec4 ray_clip = vec4(x, y, -1.0f, 1.0f); + vec4 ray_eye = inverse(proj_mat) * ray_clip; + ray_eye = vec4(ray_eye.xy(), -1.0f, 0.0f); + vec3 ray_world = normalize((inverse(view_mat) * ray_eye).xyz()); + + vec3 click_point = cam_pos + ray_world; + + /* Now, we need to generate the constants for the equations describing + * a 3D line: + * (x - x0) / a = (y - y0) / b = (z - z0) / c + * + * The line goes through the camera position, so + * cam_pos = + */ + + cout << "Converted -> (" << ray_world.x << "," << ray_world.y << "," << ray_world.z << ")" << endl << endl;; + cout << "Camera -> (" << cam_pos.x << "," << cam_pos.y << "," << cam_pos.z << ")" << endl; + cout << "Click point -> (" << click_point.x << "," << click_point.y << "," << click_point.z << ")" << endl; + + float a = 1.0f; + float b = a * (click_point.y - cam_pos.y) / (click_point.x - cam_pos.x); + float c = a * (click_point.z - cam_pos.z) / (click_point.x - cam_pos.x); + + cout << "(x - " << cam_pos.x << ") / " << a << " = "; + cout << "(y - " << cam_pos.y << ") / " << b << " = "; + cout << "(z - " << cam_pos.z << ") / " << c << endl;; + + /* Now, we need to generate the constants for the equations describing + * a 3D plane: + * dx + ey +fz +g = 0 + */ + + cout << "Points on the plane" << endl; + cout << "(" << face_point1.x << "," << face_point1.y << "," << face_point1.z << ")" << endl; + cout << "(" << face_point2.x << "," << face_point2.y << "," << face_point2.z << ")" << endl; + cout << "(" << face_point3.x << "," << face_point3.y << "," << face_point3.z << ")" << endl; + + // get intersection + } } @@ -54,7 +116,4 @@ GLFWwindow* window = NULL; - int width = 640; - int height = 480; - if (FULLSCREEN) { GLFWmonitor* mon = glfwGetPrimaryMonitor(); @@ -75,4 +134,7 @@ return 1; } + + glfwSetMouseButtonCallback(window, mouse_button_callback); + glfwMakeContextCurrent(window); glewExperimental = GL_TRUE; @@ -122,4 +184,9 @@ }; + // initialize global variables for click intersection test + face_point1 = vec3(points[0], points[1], points[2]); + face_point2 = vec3(points[3], points[4], points[5]); + face_point3 = vec3(points[6], points[7], points[8]); + GLfloat colors[] = { 1.0, 0.0, 0.0, @@ -166,6 +233,10 @@ int numPoints2 = (sizeof(points2) / sizeof(float)) / 3; + /* mat4 T_model = translate(mat4(), vec3(0.5f, 0.0f, 0.0f)); mat4 R_model = rotate(mat4(), 4.0f, vec3(0.0f, 1.0f, 0.0f)); + */ + mat4 T_model = translate(mat4(), vec3(0.0f, 0.0f, 0.0f)); + mat4 R_model = rotate(mat4(), 0.0f, vec3(0.0f, 1.0f, 0.0f)); mat4 model_mat = T_model*R_model; @@ -234,10 +305,10 @@ float cam_yaw_speed = 60.0f*ONE_DEG_IN_RAD; - float cam_pos[] = {0.0f, 0.0f, 2.0f}; + cam_pos = vec3(0.0f, 0.0f, 2.0f); float cam_yaw = 0.0f; - mat4 T = translate(mat4(), vec3(-cam_pos[0], -cam_pos[1], -cam_pos[2])); + mat4 T = translate(mat4(), vec3(-cam_pos.x, -cam_pos.y, -cam_pos.z)); mat4 R = rotate(mat4(), -cam_yaw, vec3(0.0f, 1.0f, 0.0f)); - mat4 view_mat = R*T; + view_mat = R*T; float near = 0.1f; @@ -252,5 +323,5 @@ float Pz = -(2.0f * far * near) / (far - near); - float proj_mat[] = { + float proj_arr[] = { Sx, 0.0f, 0.0f, 0.0f, 0.0f, Sy, 0.0f, 0.0f, @@ -258,4 +329,5 @@ 0.0f, 0.0f, Pz, 0.0f, }; + proj_mat = make_mat4(proj_arr); GLint model_mat_loc = glGetUniformLocation(shader_program2, "model"); @@ -269,9 +341,9 @@ glUseProgram(shader_program); glUniformMatrix4fv(model_test_loc, 1, GL_FALSE, value_ptr(model_mat)); - glUniformMatrix4fv(proj_test_loc, 1, GL_FALSE, proj_mat); + glUniformMatrix4fv(proj_test_loc, 1, GL_FALSE, value_ptr(proj_mat)); glUseProgram(shader_program2); glUniformMatrix4fv(model_mat_loc, 1, GL_FALSE, value_ptr(model_mat2)); - glUniformMatrix4fv(proj_mat_loc, 1, GL_FALSE, proj_mat); + glUniformMatrix4fv(proj_mat_loc, 1, GL_FALSE, value_ptr(proj_mat)); // glUniform1i(tex_loc, 0); @@ -319,21 +391,21 @@ float dist = cam_speed * elapsed_seconds; if (glfwGetKey(window, GLFW_KEY_A)) { - cam_pos[0] -= cos(cam_yaw)*dist; - cam_pos[2] += sin(cam_yaw)*dist; + cam_pos.x -= cos(cam_yaw)*dist; + cam_pos.z += sin(cam_yaw)*dist; cam_moved = true; } if (glfwGetKey(window, GLFW_KEY_D)) { - cam_pos[0] += cos(cam_yaw)*dist; - cam_pos[2] -= sin(cam_yaw)*dist; + cam_pos.x += cos(cam_yaw)*dist; + cam_pos.z -= sin(cam_yaw)*dist; cam_moved = true; } if (glfwGetKey(window, GLFW_KEY_W)) { - cam_pos[0] -= sin(cam_yaw)*dist; - cam_pos[2] -= cos(cam_yaw)*dist; + cam_pos.x -= sin(cam_yaw)*dist; + cam_pos.z -= cos(cam_yaw)*dist; cam_moved = true; } if (glfwGetKey(window, GLFW_KEY_S)) { - cam_pos[0] += sin(cam_yaw)*dist; - cam_pos[2] += cos(cam_yaw)*dist; + cam_pos.x += sin(cam_yaw)*dist; + cam_pos.z += cos(cam_yaw)*dist; cam_moved = true; } @@ -347,5 +419,5 @@ } if (cam_moved) { - T = translate(mat4(), vec3(-cam_pos[0], -cam_pos[1], -cam_pos[2])); + T = translate(mat4(), vec3(-cam_pos.x, -cam_pos.y, -cam_pos.z)); R = rotate(mat4(), -cam_yaw, vec3(0.0f, 1.0f, 0.0f)); view_mat = R*T;