plan

shaders/manif.fs

@@ -1,22 +1,8 @@
 #version 330
 
-in vec4 mvpos;
-in vec3 N;
-
+in float il;
 out vec4 fragColor;
 
-uniform vec4 scolor;
-uniform vec4 lcolor;
-uniform vec4 lumpos;
-
 void main() {
-  vec4 ambient = 0.15f * lcolor * scolor;
-  vec3 Ld = normalize(mvpos.xyz - lumpos.xyz);
-  float ild = clamp(dot(normalize(N), -normalize(Ld)), 0, 1);
-  vec4 diffus = (ild * lcolor) * scolor;
-  vec3 R = reflect(Ld, N);
-  vec3 Vue = vec3(0, 0, -1);
-  float ils = pow(clamp(dot(R, -Vue), 0, 1), 10);
-  vec4 spec = ils * lcolor;
-  fragColor = ambient + diffus + spec;
+  fragColor = il * vec4(0.35f, 0.35f, 0.43f, 1.0f);
 }

shaders/manif.vs

@@ -3,15 +3,12 @@
 layout(location = 0) in vec3 pos;
 layout(location = 1) in vec3 normal;
 
-uniform mat4 proj;
-uniform mat4 mod;
-uniform mat4 view;
-
-out vec4 mvpos;
-out vec3 N;
+out float il;
+uniform mat4 proj, model, view;
 
 void main() {
-  N = (inverse(transpose(mod)) * vec4(normal, 0)).xyz;
-  mvpos = view * mod * vec4(pos, 1.0);
-  gl_Position = proj * mvpos;
+  vec3 Ld = normalize(vec3(0.0, -0.2, -1.0));
+  vec3 n = normalize(transpose(inverse(view * model)) * vec4(normal, 0.0)).xyz;
+  il = clamp(dot(n, -Ld), 0.0, 1.0);
+  gl_Position = proj * view * model * vec4(pos, 1.0);
 }

src/manif.c

@@ -1,6 +1,7 @@
 #include "../includes/animations.h"
 
 static GLuint _pId = 0;
+static GLuint _planId = 0;
 
 static void init(void);
 static void draw(void);
@@ -21,21 +22,39 @@ void manif(int state) {
 }
 
 static void init(void) {
+  _planId = gl4dgGenQuadf();
   _pId =
       gl4duCreateProgram("<vs>shaders/manif.vs", "<fs>shaders/manif.fs", NULL);
 
   gl4duGenMatrix(GL_FLOAT, "proj");
-  gl4duGenMatrix(GL_FLOAT, "mod");
+  gl4duGenMatrix(GL_FLOAT, "model");
   gl4duGenMatrix(GL_FLOAT, "view");
 
   glEnable(GL_DEPTH_TEST);
 }
 
 static void draw(void) {
-  glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+  glClearColor(0.2f, 0.2f, 0.8f, 1);
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+  glUseProgram(_pId);
 
-  /*  */
+  gl4duBindMatrix("proj");
+  gl4duLoadIdentityf();
+  GLfloat ratio = (GLfloat)_dims[0] / (GLfloat)_dims[1];
+  gl4duFrustumf(-1, 1, -ratio, ratio, 1, 1000);
+
+  gl4duBindMatrix("view");
+  gl4duLoadIdentityf();
+  const GLfloat distance = 2;
+  gl4duLookAtf(0, distance, distance, 0, 0, 0, 0, 1, 0);
+
+  gl4duBindMatrix("model");
+  gl4duLoadIdentityf();
+  gl4duRotatef(-90, 1, 0, 0);
+  gl4duScalef(4 * distance, 2 * distance, 1);
+
+  gl4duSendMatrices();
+  gl4dgDraw(_planId);
 
   glUseProgram(0);
 }