[Performous-commit] Lasse Karkkainen : Very hacky guitar note drawing.

[Lasse Kärkkäi. <tr...@us...>]

Module: performous
Branch: master
Commit: 9b19d01eda805464b1889ac43be1afd43c3dd36b

Author: Lasse Karkkainen <tro...@tr...>
Date:   Sat Jul 18 20:59:44 2009 +0300

Very hacky guitar note drawing.

---

 game/glutil.hh      |    7 +++++
 game/guitargraph.cc |   62 +++++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 62 insertions(+), 7 deletions(-)

diff --git a/game/glutil.hh b/game/glutil.hh
index 96c9541..e84093a 100644
--- a/game/glutil.hh
+++ b/game/glutil.hh
@@ -12,5 +12,12 @@ namespace glutil {
 		Begin(GLint mode) { glBegin(mode); }
 		~Begin() { glEnd(); }
 	};
+	
+	struct Color {
+		float r, g, b, a;
+		Color(float r_, float g_, float b_, float a_ = 1.0): r(r_), g(g_), b(b_), a(a_) {}
+		operator float*() { return reinterpret_cast<float*>(this); }
+		operator float const*() const { return reinterpret_cast<float const*>(this); }
+	};
 }
 
diff --git a/game/guitargraph.cc b/game/guitargraph.cc
index 86a2273..79872fc 100644
--- a/game/guitargraph.cc
+++ b/game/guitargraph.cc
@@ -3,17 +3,65 @@
 GuitarGraph::GuitarGraph(Song const& song): m_song(song), m_neck("guitarneck.svg") {}
 
 void GuitarGraph::draw(double time) {
-	UseTexture tex(m_neck);
+	if (m_song.tracks.empty()) return; // Can't render without tracks (FIXME: actually screen_song should choose a track for us)
 	glutil::PushMatrix pmb;
 	glTranslatef(0.0f, 0.3f, 0.0f);
 	glRotatef(80.0f, 1.0f, 0.0f, 0.0f);
 	glScalef(0.1f, 0.1f, 0.1f);
 	float ts = 12.0f;
 	float future = 3.0f;
-	glutil::Begin block(GL_QUADS);
-	glTexCoord2f(0.0f, -(time + future)); glColor4f(1.0f, 1.0f, 1.0f, 0.0f); glVertex2f(-2.5f, -future * ts);
-	glTexCoord2f(1.0f, -(time + future)); glColor4f(1.0f, 1.0f, 1.0f, 0.0f); glVertex2f(2.5f, -future * ts);
-	glTexCoord2f(1.0f, -(time + 0.0f)); glColor4f(1.0f, 1.0f, 1.0f, 1.0f); glVertex2f(2.5f, 0.0f * ts);
-	glTexCoord2f(0.0f, -(time + 0.0f)); glColor4f(1.0f, 1.0f, 1.0f, 1.0f); glVertex2f(-2.5f, 0.0f * ts);
-	glColor3f(1.0f, 1.0f, 1.0f);
+	{
+		UseTexture tex(m_neck);
+		glutil::Begin block(GL_QUADS);
+		glTexCoord2f(0.0f, -(time + future)); glColor4f(1.0f, 1.0f, 1.0f, 0.0f); glVertex2f(-2.5f, -future * ts);
+		glTexCoord2f(1.0f, -(time + future)); glColor4f(1.0f, 1.0f, 1.0f, 0.0f); glVertex2f(2.5f, -future * ts);
+		glTexCoord2f(1.0f, -(time + 0.0f)); glColor4f(1.0f, 1.0f, 1.0f, 1.0f); glVertex2f(2.5f, 0.0f * ts);
+		glTexCoord2f(0.0f, -(time + 0.0f)); glColor4f(1.0f, 1.0f, 1.0f, 1.0f); glVertex2f(-2.5f, 0.0f * ts);
+		glColor3f(1.0f, 1.0f, 1.0f);
+	}
+	enum Difficulty {
+		DIFFICULTY_SUPAEASY,
+		DIFFICULTY_EASY,
+		DIFFICULTY_MEDIUM,
+		DIFFICULTY_AMAZING,
+		DIFFICULTYCOUNT
+	} level = DIFFICULTY_MEDIUM;
+
+	int basepitch;	
+	switch (level) {
+		case DIFFICULTY_SUPAEASY: basepitch = 0x3c; break;
+		case DIFFICULTY_EASY: basepitch = 0x48; break;
+		case DIFFICULTY_MEDIUM: basepitch = 0x54; break;
+		case DIFFICULTY_AMAZING: basepitch = 0x60; break;
+		default: throw std::logic_error("Invalid difficulty level");
+	}
+
+	static glutil::Color fretColors[5] = {
+		glutil::Color(0.0f, 1.0f, 0.0f),
+		glutil::Color(1.0f, 0.0f, 0.0f),
+		glutil::Color(1.0f, 1.0f, 0.0f),
+		glutil::Color(0.0f, 0.0f, 1.0f),
+		glutil::Color(1.0f, 0.5f, 0.0f)
+	};
+	NoteMap const& nm = m_song.tracks.begin()->second;
+	for (int fret = 0; fret < 5; ++fret) {
+		NoteMap::const_iterator it = nm.find(basepitch + fret);
+		if (it == nm.end()) continue;
+		Durations const& durs = it->second;
+		for (Durations::const_iterator it2 = durs.begin(); it2 != durs.end(); ++it2) {
+			glutil::Begin block(GL_QUADS);
+			float tBeg = -(time - it2->begin);
+			float tEnd = -(time - it2->end);
+			if (tBeg > future) break;
+			float x = -2.0f + fret;
+			float w = 0.25f;
+			glutil::Color c = fretColors[fret];
+			c.a = 1.0f - tEnd / future; glColor4fv(c);
+			glVertex2f(x - w, -tEnd * ts);
+			glVertex2f(x + w, -tEnd * ts);
+			c.a = 1.0f - tBeg / future; glColor4fv(c);
+			glVertex2f(x + w, -tBeg * ts);
+			glVertex2f(x - w, -tBeg * ts);
+		}
+	}
 }