X-Git-Url: https://eleni.mutantstargoat.com/git/?a=blobdiff_plain;f=src%2Fopengl%2Fmesh-gl.cc;h=dd73bf386f8d1d13e31df73a8680da236ac20fbb;hb=47982b199010496e34eefb95044275fb231cba18;hp=42c2af9251e9dac300fe228188abf6206b2a932a;hpb=4bc86b416f29b4889075ad5c8dfdb1e11454a6c3;p=demo

diff --git a/src/opengl/mesh-gl.cc b/src/opengl/mesh-gl.cc
index 42c2af9..dd73bf3 100644
--- a/src/opengl/mesh-gl.cc
+++ b/src/opengl/mesh-gl.cc
@@ -1,4 +1,5 @@
 #include <GL/glew.h>
+#include <GL/gl.h>
 #include <gmath/gmath.h>
 
 #include "mesh-gl.h"
@@ -14,6 +15,9 @@ MeshGL::MeshGL()
 
 	num_vertices = 0;
 	num_indices = 0;
+
+	/* draw normals */
+	nvao = nvbo = 0;
 }
 
 MeshGL::MeshGL(const MeshGL &mesh)
@@ -29,6 +33,9 @@ MeshGL::MeshGL(const MeshGL &mesh)
 	ibo = 0;
 	vao = 0;
 
+	/* draw normals */
+	nvao = nvbo = 0;
+
 	/*
 	 * if we set these to the actual
 	 * vertices.size() and indices.size()
@@ -66,15 +73,45 @@ MeshGL::~MeshGL()
 
 void MeshGL::draw() const
 {
-	if(!vao)
-		return;
-
+	if(!vdata_valid) {
+		((MeshGL*)this)->update_vertex_data();
+	}
 	glBindVertexArray(vao);
 
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
-	glDrawElements(GL_TRIANGLES, num_indices, GL_UNSIGNED_INT, 0);
+	glDrawElements(GL_TRIANGLES, num_indices, GL_UNSIGNED_SHORT, 0);
+
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+	glBindVertexArray(0);
+}
 
+void MeshGL::draw_normals(float scale) const
+{
+	if(!nvao) {
+		glGenVertexArrays(1, &nvao);
+		glBindVertexArray(nvao);
+
+		glGenBuffers(1, &nvbo);
+		glBindBuffer(GL_ARRAY_BUFFER, nvbo);
+		
+		glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(Vec3) * 2, 0, GL_STATIC_DRAW);
+		Vec3 *data = (Vec3 *)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
+
+		for (size_t i = 0; i < normals.size(); i++)
+		{
+			*data++ = vertices[i];
+			*data++ = vertices[i] + normals[i] * scale;
+		}
+		glUnmapBuffer(GL_ARRAY_BUFFER);
+
+		glVertexAttribPointer(MESH_VERTEX, 3, GL_FLOAT, GL_FALSE, sizeof(Vec3), 0);
+		glEnableVertexAttribArray(MESH_VERTEX);
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+	} else {
+		glBindVertexArray(nvao);
+	}
+
+	glDrawArrays(GL_LINES, 0, normals.size() * 2);
 	glBindVertexArray(0);
 }
 
@@ -85,8 +122,10 @@ void MeshGL::update_vertex_data()
 
 void MeshGL::update_vbo()
 {
-	if(!num_vertices)
+	if(vertices.empty()) {
+		printf("empty vertices\n");
 		return;
+	}
 
 	/* vao */
 	if(!vao)
@@ -130,6 +169,8 @@ void MeshGL::update_vbo()
 		glBufferSubData(GL_ARRAY_BUFFER, 0, tex_coords.size() * sizeof(Vec2), &tex_coords[0]);
 	glVertexAttribPointer(MESH_TEXTURE, 2, GL_FLOAT, GL_FALSE, sizeof(Vec2), 0);
 
+	num_vertices = vertices.size();
+
 	/* indices */
 
 	if(!ibo)
@@ -143,13 +184,11 @@ void MeshGL::update_vbo()
 		                &indices[0]);
 
 	num_indices = indices.size();
-	num_vertices = vertices.size();
 
 	glEnableVertexAttribArray(MESH_VERTEX);
 	glEnableVertexAttribArray(MESH_NORMAL);
 	glEnableVertexAttribArray(MESH_TEXTURE);
 
-
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
 	glBindBuffer(GL_ARRAY_BUFFER, 0);
 	glBindVertexArray(0);
@@ -164,6 +203,12 @@ void MeshGL::destroy_vbo()
 	if(vbo_tex_coords)
 		glDeleteBuffers(1, &vbo_tex_coords);
 	if(ibo)
-		if(vao)
-			glDeleteVertexArrays(1, &vao);
+		glDeleteBuffers(1, &ibo);
+	if (vao)
+		glDeleteVertexArrays(1, &vao);
+
+	if(nvbo)
+		glDeleteBuffers(1, &nvbo);
+	if(nvao)
+		glDeleteVertexArrays(1, &nvao);
 }
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