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TDT4230_final_project/src/gamelogic.cpp

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#include "gamelogic.h"
#include "sceneGraph.hpp"
#include <GLFW/glfw3.h>
#include <SFML/Audio/Sound.hpp>
#include <SFML/Audio/SoundBuffer.hpp>
#include <chrono>
#include <glad/glad.h>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <glm/vec3.hpp>
#include <iostream>
#include <string>
#include <utilities/glfont.h>
#include <utilities/glutils.h>
#include <utilities/imageLoader.hpp>
#include <utilities/mesh.h>
#include <utilities/shader.hpp>
#include <utilities/shapes.h>
#include <utilities/timeutils.h>
using glm::vec3;
using glm::mat4;
typedef unsigned int uint;
enum KeyFrameAction {
BOTTOM, TOP
};
#include <timestamps.h>
double padPositionX = 0;
double padPositionY = 0;
uint currentKeyFrame = 0;
uint previousKeyFrame = 0;
SceneNode* rootNode;
SceneNode* boxNode;
SceneNode* ballNode;
SceneNode* padNode;
SceneNode* hudNode;
SceneNode* textNode;
SceneNode* lightNode[3];
double ballRadius = 3.0f;
// These are heap allocated, because they should not be initialised at the start of the program
sf::Sound* sound;
sf::SoundBuffer* buffer;
Gloom::Shader* default_shader;
Gloom::Shader* test_shader;
Gloom::Shader* plain_shader;
Gloom::Shader* post_shader;
const vec3 boxDimensions(180, 90, 50);
const vec3 padDimensions(30, 3, 40);
vec3 ballPosition(0, ballRadius + padDimensions.y, boxDimensions.z / 2);
vec3 ballDirection(1, 1, 0.02f);
const float BallVerticalTravelDistance = boxDimensions.y - 2.0 * ballRadius - padDimensions.y;
CommandLineOptions options;
bool hasStarted = false;
bool hasLost = false;
bool jumpedToNextFrame = false;
// Modify if you want the music to start further on in the track. Measured in seconds.
const float debug_startTime = 45;
double totalElapsedTime = debug_startTime;
// textures
PNGImage t_charmap;
PNGImage t_cobble_diff;
PNGImage t_cobble_normal;
void mouseCallback(GLFWwindow* window, double x, double y) {
int windowWidth, windowHeight;
glfwGetWindowSize(window, &windowWidth, &windowHeight);
glViewport(0, 0, windowWidth, windowHeight);
padPositionX = x / double(windowWidth);
padPositionY = y / double(windowHeight);
if(padPositionX > 1) {
padPositionX = 1;
glfwSetCursorPos(window, windowWidth, y);
} else if(padPositionX < 0) {
padPositionX = 0;
glfwSetCursorPos(window, 0, y);
}
if(padPositionY > 1) {
padPositionY = 1;
glfwSetCursorPos(window, x, windowHeight);
} else if(padPositionY < 0) {
padPositionY = 0;
glfwSetCursorPos(window, x, 0);
}
}
void initGame(GLFWwindow* window, CommandLineOptions gameOptions) {
buffer = new sf::SoundBuffer();
if (!buffer->loadFromFile("../res/Hall of the Mountain King.ogg")) {
return;
}
options = gameOptions;
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
glfwSetCursorPosCallback(window, mouseCallback);
// load shaders
default_shader = new Gloom::Shader();
default_shader->makeBasicShader("../res/shaders/simple.vert", "../res/shaders/simple.frag");
Mesh box = generateBox(boxDimensions.x, boxDimensions.y, boxDimensions.z, true);
Mesh pad = generateBox(padDimensions.x, padDimensions.y, padDimensions.z, false);
Mesh sphere = generateSphere(1.0, 40, 40);
uint ballVAO = generateBuffer(sphere);
uint boxVAO = generateBuffer(box, true);
uint padVAO = generateBuffer(pad);
// textures
t_charmap = loadPNGFile("../res/textures/charmap.png");
t_cobble_diff = loadPNGFile("../res/textures/cobble_diff.png");
t_cobble_normal = loadPNGFile("../res/textures/cobble_normal.png");
uint t_charmapID = generateTexture(t_charmap);
uint t_cobble_diffID = generateTexture(t_cobble_diff);
uint t_cobble_normalID = generateTexture(t_cobble_normal);
rootNode = createSceneNode();
boxNode = createSceneNode(NORMAL_TEXTURED_GEOMETRY);
padNode = createSceneNode();
ballNode = createSceneNode();
hudNode = createSceneNode(HUD);
textNode = createSceneNode(TEXTURED_GEOMETRY);
rootNode->children.push_back(boxNode);
rootNode->children.push_back(padNode);
rootNode->children.push_back(ballNode);
rootNode->children.push_back(hudNode);
hudNode->children.push_back(textNode);
//rootNode->children.push_back(textNode);
boxNode->vertexArrayObjectID = boxVAO;
boxNode->VAOIndexCount = box.indices.size();
boxNode->diffuseTextureID = t_cobble_diffID;
boxNode->normalTextureID = t_cobble_normalID;
padNode->vertexArrayObjectID = padVAO;
padNode->VAOIndexCount = pad.indices.size();
ballNode->vertexArrayObjectID = ballVAO;
ballNode->VAOIndexCount = sphere.indices.size();
// task 1a, add point lights
for (int i = 0; i<3; i++) {
lightNode[i] = createSceneNode();
lightNode[i]->nodeType = SceneNodeType::POINT_LIGHT;
lightNode[i]->lightID = i;
}
rootNode->children.push_back(lightNode[0]);
rootNode->children.push_back(lightNode[1]);
ballNode->children.push_back(lightNode[2]);
lightNode[0]->position = {boxDimensions.x/2 - 10, boxDimensions.y/2 - 10, boxDimensions.z/2 - 10};
lightNode[1]->position = {-300, -500, 300};
lightNode[2]->position = {0, 0, 0};
lightNode[1]->nodeType = SPOT_LIGHT;
padNode->targeted_by = lightNode[1];
// hud
Mesh hello_world = generateTextGeometryBuffer("Skjer'a bagera?", 1.3, 2);
textNode->position = vec3(-1.0, 0.0, 0.0);
textNode->rotation = vec3(0.0, 0.0, 0.0);
textNode->vertexArrayObjectID = generateBuffer(hello_world);
textNode->VAOIndexCount = hello_world.indices.size();
textNode->diffuseTextureID = t_charmapID;
textNode->isIlluminated = false;
textNode->isInverted = true;
getTimeDeltaSeconds();
std::cout << "Ready. Click to start!" << std::endl;
}
void updateNodeTransformations(SceneNode* node, mat4 transformationThusFar, mat4 V, mat4 P) {
mat4 transformationMatrix(1.0);
switch(node->nodeType) {
case HUD:
// We orthographic now, bitches!
// set orthographic VP
V = mat4(1.0);
P = glm::ortho(-float(windowWidth) / float(windowHeight), float(windowWidth) / float(windowHeight), -1.0f, 1.0f);//, -10.0f, 120.0f);
break;
case NORMAL_TEXTURED_GEOMETRY:
case TEXTURED_GEOMETRY:
case GEOMETRY:
transformationMatrix =
glm::translate(mat4(1.0), node->position)
* glm::translate(mat4(1.0), node->referencePoint)
* glm::rotate(mat4(1.0), node->rotation.z, vec3(0,0,1))
* glm::rotate(mat4(1.0), node->rotation.y, vec3(0,1,0))
* glm::rotate(mat4(1.0), node->rotation.x, vec3(1,0,0))
* glm::translate(mat4(1.0), -node->referencePoint)
* glm::scale(mat4(1.0), node->scale);
break;
case POINT_LIGHT:
case SPOT_LIGHT:
transformationMatrix =
glm::translate(mat4(1.0), node->position);
break;
}
mat4 M = transformationThusFar * transformationMatrix;
mat4 MV = V*M;
node->MV = MV;
node->MVP = P*MV;
node->MVnormal = glm::inverse(glm::transpose(MV));
for(SceneNode* child : node->children) {
updateNodeTransformations(child, M, V, P);
}
if (node->targeted_by != nullptr) {
assert(node->targeted_by->nodeType == SPOT_LIGHT);
node->targeted_by->rotation = vec3(MV*glm::vec4(node->position, 1.0));
//std::cout << node->targeted_by->rotation[0]
// << " " << node->targeted_by->rotation[1]
// << " " << node->targeted_by->rotation[2]
// << std::endl;
}
}
void updateFrame(GLFWwindow* window) {
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
double timeDelta = getTimeDeltaSeconds();
if(!hasStarted) {
if (glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_1)) {
if (options.enableMusic) {
sound = new sf::Sound();
sound->setBuffer(*buffer);
sf::Time startTime = sf::seconds(debug_startTime);
sound->setPlayingOffset(startTime);
sound->play();
}
totalElapsedTime = debug_startTime;
hasStarted = true;
}
ballPosition.x = (1 - padPositionX) * (boxDimensions.x - padDimensions.x) + padDimensions.x / 2.0;
ballPosition.y = ballRadius + padDimensions.y;
} else {
// I really should calculate this using the std::chrono timestamp for this
// You definitely end up with a cumulative error when doing lots of small additions like this
// However, for a game that lasts only a few minutes this is fine.
totalElapsedTime += timeDelta;
if(hasLost) {
ballRadius += 200 * timeDelta;
if(ballRadius > 999999) {
ballRadius = 999999;
}
} else {
for (uint i = currentKeyFrame; i < keyFrameTimeStamps.size(); i++) {
if (totalElapsedTime < keyFrameTimeStamps.at(i)) {
continue;
}
currentKeyFrame = i;
}
jumpedToNextFrame = currentKeyFrame != previousKeyFrame;
previousKeyFrame = currentKeyFrame;
double frameStart = keyFrameTimeStamps.at(currentKeyFrame);
double frameEnd = keyFrameTimeStamps.at(currentKeyFrame + 1); // Assumes last keyframe at infinity
double elapsedTimeInFrame = totalElapsedTime - frameStart;
double frameDuration = frameEnd - frameStart;
double fractionFrameComplete = elapsedTimeInFrame / frameDuration;
double ballYCoord;
const float ballBottomY = ballRadius + padDimensions.y;
KeyFrameAction currentOrigin = keyFrameDirections.at(currentKeyFrame);
KeyFrameAction currentDestination = keyFrameDirections.at(currentKeyFrame + 1);
if (currentOrigin == BOTTOM && currentDestination == BOTTOM) {
ballYCoord = ballBottomY;
} else if (currentOrigin == TOP && currentDestination == TOP) {
ballYCoord = ballBottomY + BallVerticalTravelDistance;
} else if (currentDestination == BOTTOM) {
ballYCoord = ballBottomY + BallVerticalTravelDistance * (1 - fractionFrameComplete);
} else if (currentDestination == TOP) {
ballYCoord = ballBottomY + BallVerticalTravelDistance * fractionFrameComplete;
}
const float ballSpeed = 60.0f;
ballPosition.x += timeDelta * ballSpeed * ballDirection.x;
ballPosition.y = ballYCoord;
ballPosition.z += timeDelta * ballSpeed * ballDirection.z;
if (ballPosition.x + ballRadius > boxDimensions.x) {
// Crude approximation, because it does not compute the intersection with the wall
// Not doing it causes the ball to get stuck in the wall though
ballPosition.x = boxDimensions.x - ballRadius;
ballDirection.x *= -1;
} else if (ballPosition.x - ballRadius < 0) {
ballPosition.x = ballRadius;
ballDirection.x *= -1;
}
if (ballPosition.y + ballRadius > boxDimensions.y) {
ballPosition.y = boxDimensions.y - ballRadius;
ballDirection.y *= -1;
} else if (ballPosition.y - ballRadius < 0) {
ballPosition.y = ballRadius;
ballDirection.y *= -1;
}
if (ballPosition.z + ballRadius > boxDimensions.z) {
ballPosition.z = boxDimensions.z - ballRadius;
ballDirection.z *= -1;
} else if (ballPosition.z - ballRadius < 0) {
ballPosition.z = ballRadius;
ballDirection.z *= -1;
}
if(options.enableAutoplay) {
padPositionX = 1 - (ballPosition.x / (boxDimensions.x - 2 * ballRadius));
padPositionY = 1 - (ballPosition.z / (boxDimensions.z - 2 * ballRadius));
}
// Check if the ball is hitting the pad when the ball is at the bottom.
// If not, you just lost the game! (hehe)
if (jumpedToNextFrame && currentOrigin == BOTTOM && currentDestination == TOP) {
double padLeftXCoordinate = (1 - padPositionX) * (boxDimensions.x - padDimensions.x);
double padRightXCoordinate = padLeftXCoordinate + padDimensions.x;
double padFrontZCoordinate = (1 - padPositionY) * (boxDimensions.z - padDimensions.z);
double padBackZCoordinate = padFrontZCoordinate + padDimensions.z;
if (ballPosition.x < padLeftXCoordinate
|| ballPosition.x > padRightXCoordinate
|| ballPosition.z < padFrontZCoordinate
|| ballPosition.z > padBackZCoordinate) {
hasLost = true;
if (options.enableMusic) {
sound->stop();
}
}
}
}
}
mat4 projection = glm::perspective(glm::radians(90.0f), float(windowWidth) / float(windowHeight), 0.1f,
120.f);
// hardcoded camera position...
mat4 cameraTransform
= glm::translate(mat4(1), vec3(0, 0, 0))
* glm::rotate(mat4(1.0), 0.2f, vec3(1, 0, 0))
* glm::rotate(mat4(1.0), float(M_PI), vec3(0, 1, 0));
updateNodeTransformations(rootNode, mat4(1.0), cameraTransform, projection);
boxNode->position = {-boxDimensions.x / 2, -boxDimensions.y / 2 - 15, boxDimensions.z - 10};
padNode->position = {-boxDimensions.x / 2 + (1 - padPositionX) * (boxDimensions.x - padDimensions.x),
-boxDimensions.y / 2 - 15,
boxDimensions.z - 10 + (1 - padPositionY) * (boxDimensions.z - padDimensions.z)};
ballNode->position = {-boxDimensions.x / 2 + ballPosition.x,
-boxDimensions.y / 2 - 15 + ballPosition.y,
boxDimensions.z - 10 + ballPosition.z};
ballNode->scale = {ballRadius, ballRadius, ballRadius};
}
void renderNode(SceneNode* node) {
struct Light { // lights as stored in the shader
// coordinates in MV space
vec3 position;
vec3 spot_target;
bool is_spot;
void push_to_shader(Gloom::Shader* shader, uint id) {
#define l(x) shader->location("light[" + std::to_string(id) + "]." + #x)
glUniform3fv (l(position) , 1, glm::value_ptr(position));
glUniform3fv (l(spot_target), 1, glm::value_ptr(spot_target));
glUniform1i (l(is_spot) , is_spot);
#undef l
}
};
static Light lights[3];
static Gloom::Shader* s = nullptr; // The currently active shader
// activate the correct shader
Gloom::Shader* node_shader = (node->shader != nullptr)
? node->shader
: default_shader;
if (s != node_shader) {
s = node_shader;
s->activate();
uint i = 0; for (Light l : lights) l.push_to_shader(s, i++);
}
// load uniforms
glUniformMatrix4fv(s->location("MVP") , 1, GL_FALSE, glm::value_ptr(node->MVP));
glUniformMatrix4fv(s->location("MV") , 1, GL_FALSE, glm::value_ptr(node->MV));
glUniformMatrix4fv(s->location("MVnormal"), 1, GL_FALSE, glm::value_ptr(node->MVnormal));
glUniform1ui(s->location("isNormalMapped"), false);
glUniform1ui(s->location("isTextured"), false);
switch(node->nodeType) {
case NORMAL_TEXTURED_GEOMETRY:
glUniform1ui(s->location("isNormalMapped"), true);
glBindTextureUnit(1, node->normalTextureID);
[[fallthrough]];
case TEXTURED_GEOMETRY:
glUniform1ui(s->location("isTextured"), true);
glBindTextureUnit(0, node->diffuseTextureID);
[[fallthrough]];
case GEOMETRY:
if(node->vertexArrayObjectID != -1) {
glUniform1ui(s->location("isIlluminated"), node->isIlluminated);
glUniform1ui(s->location("isInverted"), node->isInverted);
glBindVertexArray(node->vertexArrayObjectID);
glDrawElements(GL_TRIANGLES, node->VAOIndexCount, GL_UNSIGNED_INT, nullptr);
}
break;
case SPOT_LIGHT:
case POINT_LIGHT: {
uint id = node->lightID;
lights[id].position = vec3(node->MV * glm::vec4(node->position, 1.0));
lights[id].is_spot = node->nodeType == SPOT_LIGHT;
lights[id].spot_target = node->rotation;
lights[id].push_to_shader(s, id);
break;
}
case HUD:
default:
break;
}
for(SceneNode* child : node->children) {
renderNode(child);
}
}
void renderFrame(GLFWwindow* window) {
int windowWidth, windowHeight;
glfwGetWindowSize(window, &windowWidth, &windowHeight);
glViewport(0, 0, windowWidth, windowHeight);
renderNode(rootNode);
}
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