X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=ld42_outofspace;a=blobdiff_plain;f=src%2Fgamescr.cc;h=26afe4224d8ef1453fa1a79c7ee2f395e810b7cc;hp=0ae16723bd9bb638e30803ecc69d2ff282146e1b;hb=b8200afc389ccca3e86463eb48c0563c0e093552;hpb=cf0e9a55d004e5339adc265b7ea6f41bae5c3cfe

diff --git a/src/gamescr.cc b/src/gamescr.cc
index 0ae1672..26afe42 100644
--- a/src/gamescr.cc
+++ b/src/gamescr.cc
@@ -1,24 +1,147 @@
+#include <vector>
+#include <gmath/gmath.h>
 #include "game.h"
 #include "screen.h"
 #include "opengl.h"
+#include "texture.h"
+
+/* NOTES:
+ * - whistle hhgg music
+ * - colliding particles merge
+ * - select objects and center camera on them
+ */
+
+struct Particle {
+	float mass;
+	Vec2 pos;
+	Vec2 vel;
+};
+
+struct Emitter {
+	Vec2 pos;
+	float mass;
+	float rate, chunk;
+	float angle, spread;
+};
+
+
+#define SIM_DT		0.016
+
+#define GRID_SIZE	4096
+#define GRID_BITS	12
+#define GRID_X(idx)	(((idx) >> GRID_BITS) & (GRID_SIZE - 1))
+#define GRID_Y(idx)	((idx) & (GRID_SIZE - 1))
+
+#define FIELD_SIZE	2048
+#define MIN_CAM_DIST	1.0f
+#define MAX_CAM_DIST	350.0f
+
+static int pos_to_grid(float x, float y);
+
+static float grid[GRID_SIZE * GRID_SIZE];
+static Particle grid_part[GRID_SIZE * GRID_SIZE];
+
+static std::vector<Emitter> emitters;
+
+static Texture *grid_tex;
+
+static float cam_theta;
+static float cam_dist = 100.0f;
+static Vec2 *targ_pos;
+static Mat4 view_matrix, proj_matrix;
+
 
 bool GameScreen::init()
 {
+	grid_tex = new Texture;
+	if(!grid_tex->load("data/purple_grid.png")) {
+		return false;
+	}
+	grid_tex->set_anisotropy(glcaps.max_aniso);
+
 	return true;
 }
 
 void GameScreen::destroy()
 {
+	delete grid_tex;
+}
+
+static void simstep()
+{
 }
 
+static void update()
+{
+	static float interval;
+
+	interval += frame_dt;
+	if(interval >= SIM_DT) {
+		interval -= SIM_DT;
+		simstep();
+	}
+
+	// update projection matrix
+	proj_matrix.perspective(deg_to_rad(60.0f), win_aspect, 0.5, 5000.0);
+
+	// update view matrix
+	Vec3 targ;
+	if(targ_pos) {
+		targ.x = targ_pos->x;
+		targ.z = targ_pos->y;
+	}
+
+	float theta = -deg_to_rad(cam_theta);
+	Vec3 camdir = Vec3(sin(theta) * cam_dist, pow(cam_dist * 0.1, 2.0) + 0.5, cos(theta) * cam_dist);
+	Vec3 campos = targ + camdir;
+
+	view_matrix.inv_lookat(campos, targ, Vec3(0, 1, 0));
+}
 
 void GameScreen::draw()
 {
-	glClearColor(1, 0, 0, 1);
+	update();
+
+	glClearColor(0.01, 0.01, 0.01, 1);
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadMatrixf(proj_matrix[0]);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadMatrixf(view_matrix[0]);
+
+	glPushAttrib(GL_ENABLE_BIT);
+	glDisable(GL_LIGHTING);
+	glDisable(GL_CULL_FACE);
+
+	glEnable(GL_TEXTURE_2D);
+	bind_texture(grid_tex);
+
+	float maxu = FIELD_SIZE / 32.0f;
+	float maxv = FIELD_SIZE / 32.0f;
+	float hsz = FIELD_SIZE * 0.5f;
+
+	glBegin(GL_QUADS);
+	glColor3f(1, 1, 1);
+	glTexCoord2f(0, 0);
+	glVertex3f(-hsz, 0, -hsz);
+	glTexCoord2f(maxu, 0);
+	glVertex3f(hsz, 0, -hsz);
+	glTexCoord2f(maxu, maxv);
+	glVertex3f(hsz, 0, hsz);
+	glTexCoord2f(0, maxv);
+	glVertex3f(-hsz, 0, hsz);
+	glEnd();
+
+	glPopAttrib();
+}
+
+void GameScreen::reshape(int x, int y)
+{
 }
 
 
+
 void GameScreen::keyboard(int key, bool pressed)
 {
 	if(pressed) {
@@ -33,14 +156,29 @@ void GameScreen::keyboard(int key, bool pressed)
 	}
 }
 
+static int prev_x, prev_y;
+
 void GameScreen::mbutton(int bn, bool pressed, int x, int y)
 {
+	prev_x = x;
+	prev_y = y;
 }
 
 void GameScreen::mmotion(int x, int y)
 {
+	int dx = x - prev_x;
+	int dy = y - prev_y;
+	prev_x = x;
+	prev_y = y;
+
+	if(game_bnstate(2)) {
+		cam_theta += dx * 0.5;
+	}
 }
 
 void GameScreen::mwheel(int dir, int x, int y)
 {
+	cam_dist -= dir * cam_dist * 0.05f;
+	if(cam_dist <= MIN_CAM_DIST) cam_dist = MIN_CAM_DIST;
+	if(cam_dist > MAX_CAM_DIST) cam_dist = MAX_CAM_DIST;
 }