From bde4a9f40bb4af39270a124d5ef9571a83305d0a Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 30 Jan 2021 20:36:42 +0000
Subject: Restructure to allow a resource path and testing

---
 game/terrain.cpp | 26 ++++++++++----------------
 1 file changed, 10 insertions(+), 16 deletions(-)

(limited to 'game')

diff --git a/game/terrain.cpp b/game/terrain.cpp
index 3e5c187..092374c 100644
--- a/game/terrain.cpp
+++ b/game/terrain.cpp
@@ -6,14 +6,14 @@
 #include <cstddef>
 #include <gfx/gl/shader.h>
 #include <gfx/gl/transform.h>
+#include <gfx/image.h>
 #include <gfx/models/vertex.hpp>
 #include <glm/glm.hpp>
 #include <random>
 #include <stb_image.h>
-#include <stdexcept>
 
 Terrain::Terrain() :
-	m_vertexArrayObject {}, m_vertexArrayBuffers {}, texture {Texture::cachedTexture.get("res/terrain.png")}
+	m_vertexArrayObject {}, m_vertexArrayBuffers {}, texture {Texture::cachedTexture.get("terrain.png")}
 {
 	constexpr auto size {241}; // Vertices
 	constexpr auto offset {(size - 1) / 2};
@@ -65,33 +65,27 @@ Terrain::Terrain() :
 }
 
 Terrain::Terrain(const std::string & fileName) :
-	m_vertexArrayObject {}, m_vertexArrayBuffers {}, texture {Texture::cachedTexture.get("res/terrain.png")}
+	m_vertexArrayObject {}, m_vertexArrayBuffers {}, texture {Texture::cachedTexture.get("terrain.png")}
 {
 	constexpr auto resolution {100};
 
-	int width, height, numComponents;
-	unsigned char * data = stbi_load((fileName).c_str(), &width, &height, &numComponents, STBI_grey);
-
-	if (!data) {
-		throw std::runtime_error {"Unable to load heightmap: " + fileName};
-	}
+	const Image map {fileName.c_str(), STBI_grey};
 
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
-	vertices.reserve((width * height) + 4);
+	vertices.reserve((map.width * map.height) + 4);
 
-	for (auto z = 0; z < height; z += 1) {
-		for (auto x = 0; x < width; x += 1) {
+	for (auto z = 0; z < map.height; z += 1) {
+		for (auto x = 0; x < map.width; x += 1) {
 			vertices.emplace_back(
-					glm::vec3 {resolution * (x - (width / 2)), ((float)data[x + (z * width)] * 0.1F) - 1.5F,
-							resolution * (z - (height / 2))},
+					glm::vec3 {resolution * (x - (map.width / 2)), ((float)map.data[x + (z * map.width)] * 0.1F) - 1.5F,
+							resolution * (z - (map.height / 2))},
 					glm::vec2 {(x % 2) / 2.01, (z % 2) / 2.01}, glm::vec3 {0, 1, 0});
 		}
 	}
-	stbi_image_free(data);
 
-	finish(width, height, resolution);
+	finish(map.width, map.height, resolution);
 }
 
 void
-- 
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