Изменение цвета от времени

2 files changed, 13 insertions, 2 deletions

diff --git a/lesson01/a.out b/lesson01/a.out
index 3e9babe..885c317 100755
--- a/lesson01/a.out
+++ b/lesson01/a.out
diff --git a/lesson01/main.cpp b/lesson01/main.cpp
index 9182d58..647674a 100644
--- a/lesson01/main.cpp
+++ b/lesson01/main.cpp
@@ -1,6 +1,7 @@
 #include <glad/glad.h>
 #include <iostream>
 #include <GLFW/glfw3.h>
+#include <cmath>
 
 const char *vertexShaderSource = "#version 330 core\n"
     "layout (location = 0) in vec3 aPos;\n"
@@ -12,9 +13,11 @@ const char *vertexShaderSource = "#version 330 core\n"
 const char *fragmentShaderSource = "#version 330 core\n"
     "out vec4 FragColor;\n"
     "\n"
+    "uniform vec4 ourColor;"
+    "\n"
     "void main()\n"
     "{\n"
-    "    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+    "    FragColor = ourColor;\n"
     "}\0";
 
 void framebuffer_size_callback(GLFWwindow* window, int width, int height);
@@ -141,14 +144,22 @@ int main()
 			     );
 	glEnableVertexAttribArray(0);
 
-	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	/* glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); */
 	while (!glfwWindowShouldClose(window)) {
 		processInput(window);
 
 		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
 		glClear(GL_COLOR_BUFFER_BIT);
+
+		// задаём uniform fragment-шейдера
+		float timeValue = glfwGetTime();
+		float greenValue = (sin(timeValue) / 2.0f) + 0.5f;
+		int vertexColorLocation = glGetUniformLocation(shaderProgram,
+							       "ourColor");
 		
 		glUseProgram(shaderProgram);
+		glUniform4f(vertexColorLocation, 0.0f, greenValue, 0.0f, 1.0f);
+
 		glBindVertexArray(VAO);
 		/* glDrawArrays(GL_TRIANGLES, 0, 3); */
 		glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);