From d419f413daa75262cbf9ba3eb271c4028b0b6921 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Fri, 18 Jul 2008 00:13:07 +0000
Subject: oops

---
 src/render/dust.cc | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 src/render/dust.cc

(limited to 'src/render/dust.cc')

diff --git a/src/render/dust.cc b/src/render/dust.cc
new file mode 100644
index 0000000..b9e53a5
--- /dev/null
+++ b/src/render/dust.cc
@@ -0,0 +1,137 @@
+/*
+   render/dust.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#include "render/dust.h"
+#include "render/gl.h"
+#include "core/cvar.h"
+#include "core/core.h"
+#include "math/functions.h"
+#include "sys/sys.h"
+
+namespace render
+{
+
+core::Cvar *r_dust;
+core::Cvar *r_dustsize;
+
+const float MAXDUSTDISTANCE = 8.0f;
+const float MINDUSTDISTANCE = 6.0f;
+const float LOWSPEEDLIMIT = 5.0f;
+const float TRAILLENGHT = 0.25f;
+const float MAXDUSTALPHA = 0.8f;
+float	*dust;
+size_t dustsize;
+
+void Dust::init()
+{
+	r_dust = core::Cvar::get("r_dust", "1", core::Cvar::Archive);
+	r_dust->set_info("[bool] render dust");
+
+	r_dustsize = core::Cvar::get("r_dustsize", "128", core::Cvar::Archive);
+	r_dustsize->set_info("[bool] number of dust particles");
+
+	dust = 0;
+	dustsize = (size_t) r_dustsize->value();
+}
+
+void Dust::shutdown()
+{
+	if (dust) {
+		delete dust;
+		dust = 0;
+		dustsize = 0;
+	}
+}
+
+void Dust::draw()
+{
+	if (!r_dust->value()) {
+		if (dust) {
+			delete dust;
+			dust = 0;
+		}
+		return;
+	}
+	
+	if (!core::localcontrol()) {
+		return;
+	}
+
+	if ((size_t) r_dustsize->value() != dustsize) {
+		con_debug << "  changing dust size..." << std::endl;
+		if (dust) {
+			delete dust;
+			dust = 0;
+		}
+	}
+
+	dustsize = (size_t) r_dustsize->value();
+
+	if (!dustsize)	{
+		if (dust) {
+			delete dust;
+			dust = 0;
+		}
+		return;
+	}
+
+	if (!dust) {
+		con_debug << "  generating dust..." << std::endl;
+		dust = new float[dustsize*3];
+
+		for (size_t i = 0; i < dustsize; i++) {
+			dust[i*3] = core::localcontrol()->location().x +  (math::randomf(2) - 1) * MINDUSTDISTANCE;
+			dust[i*3+1] = core::localcontrol()->location().y + (math::randomf(2) - 1) * MINDUSTDISTANCE;
+			dust[i*3+2] = core::localcontrol()->location().z + (math::randomf(2) - 1) * MINDUSTDISTANCE;
+		}
+	}
+
+	if (!core::localcontrol()->speed()) 
+		return;
+
+	math::Color color;
+	if (core::localcontrol()->speed() < LOWSPEEDLIMIT) {
+		color.a = core::localcontrol()->speed() / LOWSPEEDLIMIT;
+	}
+	color.a	*= MAXDUSTALPHA;
+
+	gl::color(color);
+	gl::begin(gl::Lines);
+	math::Vector3f v;
+
+	for (size_t i = 0; i < dustsize; i++) {
+		v.assign(core::localcontrol()->location());
+		for (size_t j = 0; j < 3; j++)
+			v[j] -=  dust[i*3+j];
+
+		if (v.lengthsquared() > (core::localcontrol()->radius() + MAXDUSTDISTANCE)*(core::localcontrol()->radius() + MAXDUSTDISTANCE)) {
+/*
+			v.assign(core::localcontrol()->state()->location());
+			v += core::localcontrol()->state()->axis().forward() * (core::localcontrol()->radius() + math::randomf(MAXDUSTDISTANCE));
+			v += core::localcontrol()->state()->axis().left() *  (math::randomf(2*MINDUSTDISTANCE) - MINDUSTDISTANCE);
+ 			v += core::localcontrol()->state()->axis().up() *  (math::randomf(2*MINDUSTDISTANCE) - MINDUSTDISTANCE);
+
+			for (size_t j = 0; j < 3; j++)
+				dust[i*3+j] = v[j];
+*/
+			dust[i*3] = core::localcontrol()->location().x +  (math::randomf(2) - 1) * (MAXDUSTDISTANCE + core::localcontrol()->radius());
+			dust[i*3+1] = core::localcontrol()->location().y + (math::randomf(2) - 1) * (MAXDUSTDISTANCE + core::localcontrol()->radius());
+			dust[i*3+2] = core::localcontrol()->location().z + (math::randomf(2) - 1) * (MAXDUSTDISTANCE + core::localcontrol()->radius());
+		}
+
+		glVertex3fv(dust+3*i);
+
+		for (size_t j = 0; j < 3; j++)
+			v[j] = dust[i*3+j];
+		v -= core::localcontrol()->state()->axis().forward() * color.a * TRAILLENGHT;
+		gl::vertex(v);
+	}
+
+	gl::end();
+}
+
+}
+
-- 
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