Disable lighting and texturing while drawing model normals.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/render/draw.cc b/src/render/draw.cc
index 22ff90f..ac74c9c 100644
--- a/src/render/draw.cc
+++ b/src/render/draw.cc
@@ -514,6 +514,29 @@ void draw_pass_default()
 
 /* ---- Model Fragments -------------------------------------------- */
 
+void draw_fragment_normals(const model::Fragment *fragment, bool draw_details)
+{
+	size_t index = fragment->index();
+	size_t vertex_count = fragment->structural_size();
+	if (draw_details)
+		vertex_count += fragment->detail_size();
+
+	gl::begin(gl::Lines);
+
+	const float s = 0.05f;
+	for (size_t i = 0; i < vertex_count; i++) {
+		const float *n = &core::game()->vertexarray()->ptr()[(index+i) * 8 + 2];
+		const float *v = &core::game()->vertexarray()->ptr()[(index+i) * 8 + 5];
+
+		//gl::normal(-n[0], -n[1], -n[2]);
+		gl::vertex(v[0], v[1], v[2]);
+
+		//gl::normal(n[0], n[1], n[2]);
+		gl::vertex(v[0] + n[0] * s, v[1] + n[1] * s, v[2] + n[2] * s);
+	}
+	gl::end();
+}
+
 void draw_fragment(const model::Fragment *fragment, bool draw_details)
 {
 	size_t index = fragment->index();
@@ -725,6 +748,31 @@ void draw_model_fragments(model::Model *model,
 
 			gl::color(color);
 			draw_fragment(fragment, detail);
+			
+			if (r_normals->value()) {
+				// force reset of material settings for the next fragment
+				material = 0;
+				if (use_light) {
+					// disable lighting
+					gl::disable(GL_LIGHTING);
+					use_light = false;
+				}
+
+				if (use_env) {
+					// disable env mapping
+					gl::disable(GL_TEXTURE_GEN_S);
+					gl::disable(GL_TEXTURE_GEN_T);
+					use_env = false;
+				}
+
+				if (use_texture) {
+					gl::disable(GL_TEXTURE_2D);
+					use_texture = false;
+				}
+
+				color.assign(0.75f, 0.0f, 0.0f);
+				draw_fragment_normals(fragment, detail);
+			}
 		}
 
 		if (group->transform()) {