From 70784cdb24628e758df27cbe1965ff83102decb0 Mon Sep 17 00:00:00 2001
From: sanine-a <sanine.not@pm.me>
Date: Wed, 3 Jun 2020 00:34:36 -0500
Subject: add multiple lights to shaders

---
 include/common.h |  2 +-
 include/honey.h  |  1 +
 include/light.h  | 33 +++++++++++++++++++++++++++++++++
 include/shader.h | 21 +++++++++++++++++++++
 4 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 include/light.h

(limited to 'include')

diff --git a/include/common.h b/include/common.h
index 83934ac..680f097 100644
--- a/include/common.h
+++ b/include/common.h
@@ -42,7 +42,7 @@ typedef enum {
   
   HONEY_N_ERRORS } honey_error;
 
-#define HONEY_ERROR_DATA_STRING_LENGTH 512
+#define HONEY_ERROR_DATA_STRING_LENGTH 4096
 
 static struct {
   char string1[HONEY_ERROR_DATA_STRING_LENGTH];
diff --git a/include/honey.h b/include/honey.h
index 1d45195..77dd678 100644
--- a/include/honey.h
+++ b/include/honey.h
@@ -9,6 +9,7 @@
 #include "camera.h"
 #include "common.h"
 #include "input.h"
+#include "light.h"
 #include "mesh.h"
 #include "model.h"
 #include "primitives.h"
diff --git a/include/light.h b/include/light.h
new file mode 100644
index 0000000..93fcfd1
--- /dev/null
+++ b/include/light.h
@@ -0,0 +1,33 @@
+#ifndef HONEY_LIGHT_H
+#define HONEY_LIGHT_H
+
+#include "common.h"
+
+#define HONEY_MAX_LIGHT_NAME_LENGTH 64
+
+typedef struct {
+  vec3 position;
+  vec3 color;
+
+  float constant;
+  float linear;
+  float quadratic;
+} honey_point_light;
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+typedef struct {
+  vec3 direction;
+  vec3 color;
+} honey_directional_light;
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void honey_point_light_new(honey_point_light* light,
+                           float x, float y, float z,
+                           float r, float g, float b,
+                           float constant,
+                           float linear,
+                           float quadratic);
+
+#endif
diff --git a/include/shader.h b/include/shader.h
index 9a567f5..b502137 100644
--- a/include/shader.h
+++ b/include/shader.h
@@ -7,6 +7,7 @@
 #define HONEY_SHADER_H
 
 #include "common.h"
+#include "light.h"
 
 typedef int honey_shader;
 
@@ -85,6 +86,26 @@ void honey_shader_set_mat4(honey_shader shader,
                            char* matrix_name,
                            mat4 value);
 
+/** @brief Set a point_light uniform.
+ *
+ * @param[in] shader The shader to which the uniform belongs
+ * @param[in] point_light_index The index of the light to set
+ * @param[in] light The honey_point_light to set
+ */
+void honey_shader_set_point_light(honey_shader shader,
+                                  int point_light_index,
+                                  honey_point_light light);
+
+/** @brief Set a directional_light uniform.
+ *
+ * @param[in] shader The shader to which the uniform belongs
+ * @param[in] directional_light_index The index of the light to set
+ * @param[in] light The honey_directional_light to set
+ */
+void honey_shader_set_directional_light(honey_shader shader,
+                                      int directional_light_index,
+                                      honey_directional_light light);
+
 /** @brief Use a shader.
  */
 #define honey_shader_use glUseProgram
-- 
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