Initial commit.

material.cpp

@@ -0,0 +1,88 @@
+// -*- C++ -*-
+
+#include <OpenGL/gl.h>
+#include <iostream>
+#include <math.h>
+#include <stdlib.h>
+
+#include "material.h"
+#include "texture.h"
+
+using namespace mbostock;
+
+Material::Material()
+    : shininess_(0.f), texture_(NULL), slip_(0.f) {
+  for (int i = 0; i < 4; i++) {
+    ambient_[i] = 0.f;
+    diffuse_[i] = 0.f;
+    specular_[i] = 0.f;
+    emission_[i] = 0.f;
+  }
+}
+
+void Material::setAmbient(float r, float g, float b, float a) {
+  ambient_[0] = r;
+  ambient_[1] = g;
+  ambient_[2] = b;
+  ambient_[3] = a;
+}
+
+void Material::setDiffuse(float r, float g, float b, float a) {
+  diffuse_[0] = r;
+  diffuse_[1] = g;
+  diffuse_[2] = b;
+  diffuse_[3] = a;
+}
+
+void Material::setSpecular(float r, float g, float b, float a) {
+  specular_[0] = r;
+  specular_[1] = g;
+  specular_[2] = b;
+  specular_[3] = a;
+}
+
+void Material::setEmission(float r, float g, float b, float a) {
+  emission_[0] = r;
+  emission_[1] = g;
+  emission_[2] = b;
+  emission_[3] = a;
+}
+
+void Material::setShininess(float s) {
+  shininess_ = s;
+}
+
+void Material::setTexture(const char* path) {
+  texture_ = (path == NULL) ? NULL : &(Textures::fromFile(path));
+}
+
+void Material::setSlipAngle(float angle) {
+  slip_ = cosf(angle * (2.f * M_PI / 360.f));
+}
+
+void Material::bind() const {
+  glMaterialfv(GL_FRONT, GL_AMBIENT, ambient_);
+  glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse_);
+  glMaterialfv(GL_FRONT, GL_SPECULAR, specular_);
+  glMaterialfv(GL_FRONT, GL_EMISSION, emission_);
+  glMaterialf(GL_FRONT, GL_SHININESS, shininess_);
+  if (texture_ == NULL) {
+    glDisable(GL_BLEND);
+    glBindTexture(GL_TEXTURE_2D, GL_NONE);
+  } else {
+    texture_->bind();
+  }
+}
+
+const Material& Materials::blank() {
+  static Material m;
+  static bool init = false;
+  if (!init) {
+    init = true;
+    m.setAmbient(.2f, .2f, .1f, .1f);
+    m.setDiffuse(.4f, .1f, .1f, 1.f);
+    m.setSpecular(.05f, .05f, .05f, .1f);
+    m.setShininess(10.f);
+  }
+  return m;
+}