X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;f=src%2Ftacos.cpp;h=fe1c7aa68c73bc1b5b5f3d39e39677c93b59d537;hb=0146c7b7f02ef5d74116546489aee85383bb4969;hp=0e47e6e27af2baa545bbd961d1d0aab3f0887fcf;hpb=33346e9a5c58e92e4d7cc7cb542cf5abb7ffeb25;p=tacos.git

diff --git a/src/tacos.cpp b/src/tacos.cpp
index 0e47e6e..fe1c7aa 100644
--- a/src/tacos.cpp
+++ b/src/tacos.cpp
@@ -6,13 +6,16 @@
 #include "graphics/shader.hpp"
 #include "graphics/viewport.hpp"
 #include "graphics/window.hpp"
+#include "physics/ray.hpp"
 #include "rand/SimplexNoise.hpp"
+#include "world/Cursor.hpp"
 #include "world/Floor.hpp"
 
 #include <iostream>
 #include <GL/glew.h>
 #include <glm/glm.hpp>
 #include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtx/io.hpp>
 
 using namespace tacos;
 
@@ -41,6 +44,14 @@ int main(int argc, char *argv[]) {
 	GLint mv_location = floor_program.UniformLocation("MV");
 	GLint mvp_location = floor_program.UniformLocation("MVP");
 
+	Shader cursor_vert(asset_loader.LoadVertexShader("cursor"));
+	Shader cursor_frag(asset_loader.LoadFragmentShader("cursor"));
+	Program cursor_program;
+	cursor_program.Attach(cursor_vert);
+	cursor_program.Attach(cursor_frag);
+	cursor_program.Link();
+	GLint vp_location = cursor_program.UniformLocation("VP");
+
 	Floor floor(64, 50);
 	SimplexNoise noise(0);
 	for (int z = 0; z < floor.Depth(); ++z) {
@@ -50,14 +61,29 @@ int main(int argc, char *argv[]) {
 	}
 	floor.GenerateVertices();
 
+	Cursor cursor;
+
 	Camera camera;
 	camera.Warp(glm::vec3(20.0f, 0.0f, 20.0f));
 
 	glm::mat4 M;
 	glm::mat4 V;
+	glm::mat4 VP;
 	glm::mat4 MV;
 	glm::mat4 MVP;
 
+	// cursor stuff
+	glm::mat4 inverse_VP;
+	glm::vec2 screen_mouse;
+	{
+		int x, y;
+		SDL_GetMouseState(&x, &y);
+		screen_mouse.x = x;
+		screen_mouse.y = y;
+	}
+	Ray world_mouse;
+	glm::vec3 pointer;
+
 	constexpr float cam_speed = 15.0f; // units per second
 	constexpr float cam_rot_speed = 2.0f; // radians per second
 
@@ -68,8 +94,6 @@ int main(int argc, char *argv[]) {
 	glm::vec2 cam_rot_ccw(0.0f);
 	glm::vec2 cam_rot_cw(0.0f);
 
-	floor_program.Use();
-
 	bool running = true;
 	Uint32 last = SDL_GetTicks();
 	SDL_Event event;
@@ -167,6 +191,10 @@ int main(int argc, char *argv[]) {
 							break;
 					}
 					break;
+				case SDL_MOUSEMOTION:
+					screen_mouse.x = event.motion.x;
+					screen_mouse.y = event.motion.y;
+					break;
 				case SDL_QUIT:
 					running = false;
 					break;
@@ -186,9 +214,31 @@ int main(int argc, char *argv[]) {
 		camera.BackOff((cam_far - cam_near) * cam_speed * dt);
 		camera.Rotate((cam_rot_ccw - cam_rot_cw) * cam_rot_speed * dt);
 
-		// render
 		V = camera.View();
+		VP = viewport.Perspective() * V;
+		{ // mouse
+			inverse_VP = glm::inverse(VP);
+			glm::vec2 clip_mouse((screen_mouse * viewport.InverseSize() - 0.5f) * 2.0f);
+			// viewport space has origin in lower left, but sdl gives coordinates with orgin in upper left,
+			// so Y is inverted here (since it maps from -1 to 1 simply by negating)
+			glm::vec4 ray_begin(inverse_VP * glm::vec4(clip_mouse.x, -clip_mouse.y, -1.0f, 1.0f));
+			glm::vec4 ray_end(inverse_VP * glm::vec4(clip_mouse.x, -clip_mouse.y, 0.0f, 1.0f));
+			world_mouse.origin = glm::vec3(ray_begin) / ray_begin.w;
+			world_mouse.direction = glm::normalize((glm::vec3(ray_end) / ray_end.w) - world_mouse.origin);
+		}
+
+		//std::cout << "ray " << world_mouse.origin << ", " << world_mouse.direction << std::endl;
+		if (floor.Intersection(world_mouse, pointer)) {
+			cursor.FloorTile(floor, int(pointer.x), int(pointer.z));
+			//std::cout << "	+++ intersecting at " << pointer << std::endl;
+		} else {
+			cursor.Hide();
+			//std::cout << "	--- not intersecting" << std::endl;
+		}
+
+		// render
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		floor_program.Use();
 		for (int z = 0; z < floor.VAODepth(); ++z) {
 			for (int x = 0; x < floor.VAOWidth(); ++x) {
 				M = glm::translate(glm::mat4(1.0f), floor.VAOPosition(x, z));
@@ -199,6 +249,11 @@ int main(int argc, char *argv[]) {
 				floor.DrawVAO(x, z);
 			}
 		}
+		if (cursor.Visible()) {
+			cursor_program.Use();
+			cursor_program.Uniform(vp_location, VP);
+			cursor.Draw();
+		}
 		window.Flip();
 
 		last = now;